Right, I'm not looking for actual stores and such selling exact models - I'm more looking for a guide as to which cards offer the best performance for this price region.
Now, I'd prefer to go the ATI route - nVidia's cheating with their drivers has made me wary of their cards. That, and with Radeon cards, one brand is usaully as good as another, whereas nVidia's reference cards seem to be more complex than manufacturers prefer (8 layer PCB), leading them to change the product more drastically. Or, at least, that's what I've read.
I'm fully willing to overclock, otherwise anything goes.
PS: Nice how my lovely £ gets mangled.