Your response is appreciated, and I agree that differences in neck carves may be entirely indiscernible, save for the Pattern Vintage. And that might be one reason why I might not buy a 594, because of the heftier neck profile. Perhaps the selling point is that each has his own preferences, but it may actually require a hands-on review of the neck carve the person is looking for, rather than just trusting his gut and buying blindly.
Occasionally, I've tried that myself and either been vastly appreciative, or understandably disappointed.
Which leads to bonding with your instrument. How often have any of us bought on a whim and later discovered we just can't connect with the guitar? I think sometimes doing so invites trouble and later forces us to sell at a loss rather than decide the guitar a keeper. Perhaps this is what keeps the economy moving forward, sales and resales of guitars we initially wish to enjoy, or those someone else though they did, but changed their mind about...
I would still recommend trying the 594. On paper, its a a bit chunkier than the others but in reality it doesn't really feel like that. The asymmetric carve feels like a more broken in guitar - not to say the rolled edges of PRS guitars don't feel that way but the 594 just feels a bit more broken in than the others and really doesn't feel thicker - at least to me. Dismissing it, just because on paper its a different carve and/or thickness is a mistake - its much better to try and then dismiss if it really isn't for you but at least you know for sure - it could surprise you too...
There is something to be said for actually getting out to a music store and trying the guitars, get hands on to the necks and see how they truly feel. I have always said that if there is any doubt in you head about any aspect, especially if you are looking to spend a lot on a guitar, you want to know that it actually feels good in the hands. We all know that PRS guitars sound great, look fantastic and are built to a very high quality, but unless you actually get out and try the guitars, you won't know if they are actually a 'great' fit for you. If you do get out and try the different neck shapes, find them comfortable, then you can order in confidence from reputable dealers knowing that the 'feel' will be right as well as the sound, look, build quality etc.
In general, it seems that the majority of PRS owners tend to expand the number of PRS guitars they have. I know we see a number crop up on the used market too but I wonder how many of them are sold to be replaced by a 'newer' PRS rather than sold because the owner wasn't happy with it? I don't see the market flooded with used PRS - not saying there aren't any but for a company that is making a fair few every month and have been doing so for nearly 35 yrs, there aren't a LOT of used guitars on the market - not many buying on a whim and regretting it. You also don't know if those selling are having to sell 'something' to pay for something completely different - a car, a car repair, a new baby on the way...
I will never tell anyone how to spend their money, which guitar they should buy. All I can do is to try to help them come to their own decision as to what guitar is the right one for them, at the very least the right one that they should potentially try first - and by try, I mean go out to a Shop and 'try' first and if that wasn't the 'right' guitar - whether that's because of neck shape or feel for what ever reason, they haven't wasted money on the wrong guitar. If you can't find the 'right' colour or even model, you can still try out the 'neck' of a similar guitar and get a feel for it. For example, if you were after a Single cut semi-hollow 594, you can try a Double cut 594 and know how the neck feels, the carve of it and then search online to find a seller who has the SC 594 SH and order in confidence that the sound, feel, quality etc will be there. If they don't like the neck and find a Cu22 Pattern Regular more comfortable, they can look for guitars that have that neck.
From my perspective, having a guitar with each of the 4 PRS Pattern Necks, I could order ANY PRS, regardless of 'model' and know that the neck won't be an issue. I don't need to go to a shop and try a SC594 or HB594 because I know how that Pattern Vintage neck feels. I didn't have to go out to a shop to find my PRS Special 22, I could look at all the retailers that were selling one, pick the one I liked in the colour I liked and order it online - I also have the safety net of being able to return for a full refund within a certain time-frame too - but the 'feel' of the neck was never a concern or me because I knew how it would 'feel' because of my PRS guitars. A case in point, I didn't even look to see if it was Pattern Regular (like my 509 and like other Cu22's) or 'Pattern (like my HBii), I just knew that it would feel 'great' to me as soon as I picked it up for the first time.
I am that confident that I could order online any PRS guitar with any of the 'Pattern' neck shapes without ANY concerns about the neck feel and playability. Any person too could be in that exact same position, whether they own any PRS or not - just by going into a shop, trying guitars with the different carves and seeing which if any don't work for you. It also depends on how 'sensitive' you are to small changes.
I don't know how or why the subject of necks has arisen in this thread when the necks have been discussed in several other threads. All I tried to do here was try to give the OP an idea on where each of the PRS guitars tend to fit in the 'spectrum' with the Custom 24 being most PRS-like, through the Custom 22, McCarty and finally 594 which is more Les Paul like PRS guitar. The information was to help picture the general area these guitars fit in the market-place, how they differ and to help the OP decide where they may want to start exploring. If they were more after a PRS 'Les Paul' for example, they may want to start at the 594, try that and see if its the right guitar. Maybe that's too close, maybe the Custom 22 maybe the right place to look - more PRS but with a bit more LP-ish 'vibe'.
The point I was making with ordering online is that once you know 'exactly' what you want based on information and actually trying guitars in shops to know how a PRS feels, you do not have to buy from that shop if the colour or particular variation isn't being sold by them. Try a DC594, like the neck and then order from any retailer that has the SC594 or Semi-hollow 594 or 'blue' 594. Try a guitar with a Pattern regular and buy any PRS from any store online that has a Pattern regular neck knowing that it will feel right. Whenever anyone is unsure of anything - whether its a Core or an SE, you should NEVER buy without doing some legwork. However, you don't have to buy from the limited selection a Shop may have if the 594 isn't in the colour or variation you want, you can try it to see if the neck feels comfortable and order the 594 you saw in a shop 1000miles away that is in the colour, pattern and variation you want and you will NOT be disappointed.