| posts: 1,326 | Location: On a hill.
If you go with the Gateway, I know that it will perform well. I can play Crysis on my Gateway P6860FX, which has a little lower specs than the P7805uFX. The Gateway has a little lower resolution on a bigger screen, which will help keep games from bogging down the system. You will also get half a gig more video ram with the Gateway. My P6860FX came with a Vista disc, which included both 32bit and 64bit versions.
I say go with the Gateway, you'll be happy with it. You'll definitely be able to play games on it.