Well I've played Rainbow Six Vegas on both the PC and 360. I played on my friend's PC, and I don't know the stats, but it was a decent rig, nothing too special. A very nice 22 in ws lcd though. The game definitely looked better on the PC from what I can remember.
Half Life 2's home is on the PC...it runs best on it. If you have a pretty good computer, Half Life 2 is definitely better on that. FEAR I don't know, because I couldn't get the game to run well on my PC, haven't seen too much of that game at all.
LEFT4DEAD411.COM
Bet with disolitude: Left4Dead will have a higher Metacritic rating than Project Origin, 3 months after the second game's release. (hasn't been 3 months but it looks like I won :-p )