What other games are you into? FPS, RTS etc.
Any game IMO that is out on all formats will look better on a PC, PC only games look beautiful on the PC. You dont need a £1000 machine any longer to play PC games but consoles are definitely great value for money, it all depends on the type of game you are into. I love RTS and FPS and IMO the PC is better at both.
If I had to get a console I would buy a PS3 simply because of the other things it can be used for, I did have an XBOX but only had it about 2 months.