I got FA3 for PC, and so far, the game is awesome. The whole first chapter is so cleverly done, and it really feels like a Fallout game; it's dripping with atmosphere. Fallout 3's post-apocalyptic world is more believable than that of S.T.A.L.K.E.R., which I enjoyed.

Incidentally, I was able to run the game on ultra graphics settings on my two year-old computer (with a Nvidia 7800GTX) while inside the vault, but once outside, it started to chug a bit. However, it's silky-smooth on the high graphics settings. I'm impressed with how well the game runs on older machines.