2 BFG GeForce 6600 128MB PCI-Express SLI Video Cards
Please tell my you don't mean that.. get 1 6800GS, Ati X850XT or better yet a 7800GT. All of those cards will outperform 2 6600's (especially the 7800.. its WAY better), and you can get another one later, if you really want to go that route.
But please, don't buy 2 6600's.. You'll regret it , I swear..
I still say you'll be dissapointed.. SLI doesn't work for all games, and you have to get the damn thing to work first, too.. the 6600 is a weak card by todays standards, but if you already bought them, there's not much I (or any other person, for that matter) can do for you and your rig..
where'd you get the rest of that stuff for so cheap? I'd kill to get all that for the price. Particularly, how much did you pay for the mobo and cpu?
The case-- I have a sonata II, the ducting is pretty useless. Might be fun to mess around with once in a while, but you'll probably get better cooling if you leave it off and put two 120mm fans (one comes in the case already) in.
As for the HSF, it depends on how quiet you want your system to be-- I've been building a silent one for a while now. If you want something really quiet, I'd suggest getting a Zalman CNPS7000-AlCu, or the 7700-AlCu for your CPU. Don't get the all copper one, the cooling difference is usually less than a single degree celsius. I have a 7700cu connected to a fan controller, and with the fan at 12v, it keeps my P4 Prescott literally 20 deg. celsius cooler at load and about 10-15 at idle. With the controller at 5v, it's dead silent.
And get some non-stock vga coolers if you're going the silent route as well. Like arctic cooling nv series for you. The zalman ones, vf700 series, are also really good.