I'm cool with that hardware, except the sound card. I don't even know what that means, but get at least an X-Fi Xtremegamer. I think the Xtremegamers and better have hardware-acceleration. Thats what you want. Don't get a card that doesn't have it. I have an Xtrememusic which is one step above the gamer I think, and it costs barely more. It rocks.
Everything else in your post is the same as mine, except the mobo and vid card. But that's because your's are out of my league, so no worries there. I use a OCZ GameXtreme 700W PSU that's rock solid, but Antec is a big brand so I'm sure it will do you fine.
Stacker 830 - e6600 @ 3.6ghz - Eva 9800GTX+
X-Fi Xtrememusic - 4GB OCZ SLI 1066
Sceptre 20.1" - Logitech Z5500 - Gigabyte DS3 965p