Oh, how many MB is the GT? Well anyway I might be getting a GTS 320 for like 260 so i'm good. As you know I won't be doing extreme gaming, just some CSS and WoW and i'm gona try some new games, probably crysis
It's only $59.99, supplies 36A on it's dual 12V rails (plenty for the 8800 series cards), and it's made by one of the most reliable manufacturers around.
I don't know about the PSUs. I really like that Rosewill PSU you linked and specs look good. It's $25 after rebate and if money was an issue, get that. Rosewill has great customer service. On one of the comments left by Rosewill, they will replace your PSU for free should anything happen to it under warranty. Note: rma@rosewill.com for the replacement at their cost should something happen to it.
But if you can spend more, by all means there are quite a few good ones. That Antec PSU linked previously by freestyler105 is really nice for an awesome price. If I weren't so cheap, that's definitely a winner.