I've owned many PRS's, including half of those you mention, but never even held a 24 in hand.
Don't beat yourself up too badly.
I (ignorantly, apparently) always thought it was more of a metal guitar.
What are you really after? Are you just a collector looking to add a desirable guitar to your portfolio or is this a tone hunt? If the answer is 'I just want to own the ultimate, quintessential, and timeless PRS guitar', it's going to be a
CU24 all day long (just like the poll shows). That's the one that started it all.
But Paul is the one driving changes in the line-up and I haven't seen him playing a CU24 with his band (unless its a demo for the instrument) in a very long time. That's because he wants to play the one that is the pinnacle of PRS achievement (which was your second question). In this case (and for roughly a decade) its a 408-twist on the 25" scale, 22-fret, McCarty (AKA the
Paul's Guitar).
And then you tossed out "ultimate example of guitar evolution that retains attributes of the vintage voices we love". While the CU24 and PG are capable of conjuring vintage voices, most of us immediate associate that with humbucker-based
McCarty. This is especially true for the 24.594" scale McCarty. But you clarified "while moving everything forward as only PRS has been able to achieve" and nobody is combining vintage tones with the incredible feel of rosewood necks like PRS. Certainly not on this scale.
Bottom line: I recommend taking a big step back before concluding anything from your poll results. I think 66% of your verbiage points toward the McCarty camp. So I end as I began... what are you really after?