PC all the way. I wouldn't have built a very expensive computer and would have gone for a console like an XBox 360 if the PC wasn't better.
Also, PCs can run at higher resolutions than even 1080p HD consoles can. Consoles technically have a card that has fixed resolution settings, that will apply to everything and the games are optimized for those resolutions. On the PC, you can get crazy resolutions that cause more polygons to be rendered, for example, if I were to run Crysis at a resolution of 2000+x1600+, it would nearly double my polygon rendering instead of running it at a resolution like 1680x1050.
Also, PCs can be upgraded without voiding warranties or buying a new system!