Cheers guys,
Problem is that i have no way of testing any PRS, except for maybe Silver sky,
without travelling abroad. Thought that might be a nice vacation reason .
I’ve been drooling over the 35th anniversary model, but the versatility of the 509 intrigues me.
I really can't tell you what you should buy. Failing the opportunity to actually go out and try before you buy, the next best is to take a chance on one from a reputable seller who will accept a return if its not quite the guitar for you - obviously would need to return within the window and in the condition it arrived in but its the 'next' best option.
As I said, both the 509 and Cu24 are different guitars and, as the name implies, you get 1 extra option over a Cu24. That being said, they are still different options on both and have a different tonal centre to begin with. The only 'similar' options is the bridge or neck selection and the fact that both can be a full humbucker or a Split coil. The rest are all different because the Cu24 gives you 4 options with 'both' humbuckers together (HH, HS, SH and SS), the 509 doesn't allow for that so you have BM, M, MN (B- Bridge, M - middle, N-Neck). The neck sounds different too because the Custom24 Neck Pick up is closer to the Bridge - let alone the difference in Pick-ups themselves and of course you get 24 frets with the Cu24 too.
The only similarity is that they are both PRS guitars and that they both look similar in pictures - apart from the obvious pickups. It really is like trying to decide whether you should buy a JEM or a Les Paul - so very different in what they offer musically. I don't know anything about you, what your history of guitars has been or where you want to go musically either so I couldn't even begin to point you towards maybe considering one over the other to start with.
I would say that if you are more of a Strat/super strat player, maybe the 509 will be 'closer' to what you may prefer and the Cu24 is more towards the LP spectrum. Before ANYONE says anything, the Cu24 though is a different thing from a LP and the neck position does give it its own unique sound - but that its more a double humbucker guitar like a LP - with more options and a trem. Its closer to the LP scale length too. If you ever want to change Pick-ups, the Cu24 will offer that too - so that maybe something to consider as well. I don't change pups and buy guitars because I love the way they sound so that doesn't bother me.
I think if I was a covers band guitarist and constantly swapping between a strat and LP, I would go 509 but if I do my own thing and not so concerned about trying to sound like others, I would go Cu24-08. That being said, there is a reason I have both guitars in my toolbox (as well as other PRS's) and that reason is because they are ALL different and offer something I can only get from that guitar. If I had to hammer a screw in or use a Screwdriver to hammer a nail in, I guess I could do it but its better to have both tools to use the right one for the right job...
All I am trying to do is get you to look more at what each instrument is, what it offers and how it may differ from the other so you can try and decide which would be the best tool for you to start with - you can always add the other later....