it's really up to you.
it also depends on how easy you are on spec and the price, too.
For example things like tylers, suhrs, vigiers etc. are very nice, but they're more in the superstrat camp.
for something more along the lines of PRS, I dunno, maybe nik huber? Though the ones with the flashy tops etc. might end up being a bit more than that £2000 budget.
I like patrick eggles, but the older ones (earlier than 2000) are meant to be better (with what little experience I have with the two eras I'd cautiously agree with that) and that means going second-hand... which is a judgement call. Personally I don't much like going second-hand, to get the best prices often means Ebay (which is risky as you normally can't try first), and getting to try one first normally means a shop, which means much worse prices :lol:
JJs are quite nice, but (for me anyway) it'd depend on getting a good deal (like I got on mine). I'm not sure they're just as nice as a real PRS, but for a quarter or a fifth the price (the price I got), they're sweet. Don't think I'd pay £1200+ for one, though (which you tend to have to do for the flashier ones with the figured tops).
There's probably something really obvious which I'm forgetting too.
Where are you (roughly) in the UK? There are several big shops with a wide range of high-end brands which might be worth making a trip to. Worst case scenario (as long as you're reasonably close, lol) is that it'll just confirm that PRS is the best option, you don't have that much to lose (as long as you don't end up spending tons on travel).