Which console goes well with a gaming PC?

[Reasonable]

I have PC, PS3 and Wii and feel that works nicely. You will miss some very good exclusives on 360 (well, they do seem to come to PC eventually but MS are making signs their going to keep more on the console) - but PS3 has more exclusives that will never hit a PC as does Wii IMHO so if you are going to game on a PC, and play titles like Fallout 3 and Mirrors Edge on that, then I'd go for that combo.

I'm assuming from your post that you don't see having both PS3/360 as a viable choice - otherwise you could have all four!