The PRS wide-thin neck carve is great. I've been playing Jacksons for years with very thin necks. The PRS neck is not quite as thin but is not bulky or uncomfortable in any way. I adjusted quickly to my PRS Custom 24 with the wide-thin neck carve as soon as I took it home.
Even the wide-fat is still very comfortable with great playabilty. I would try a couple out if you can. I ordered a new PRS SC250 that comes with the wide-fat neck carve.
Best thing to do would be to play a couple of them. I don't think you'll be disapointed.