Lee_Stricklin wrote:The VGA cooler I ordered is a Sparkle Calibre which has two fans, four heat pipes, and is made of straight copper.
I've had a look at I think it's a rebadged Arctic-Cooling Accelero Twin Turbo. Not a bad heatsink but also available aftermarket as is the Accelero S1 which you could then strap a pair of 120mm fans too.
Lee_Stricklin wrote:I thought the case was huge when I first got it, but now that I've seen the video card and not to mention the heatsink (holyshit!) I'm gonna need the space.
You won't actually need the space for this size of heatsink. By adding the space you'll actually hit cooling performance by introducing a gap between the front intake fan and the graphics card. I use a bigger heatsink, the aforementioned Accelero S1 in a Silverstone SG03 which is a uATX case. About 30mm gap to the front fans:

Lee_Stricklin wrote:though my VGA requires at minimum a 450 watt
Any PSU 'requirement' stated for a consumer graphics card should be ignored. The max TDP for a 9800GT is 105W, that's less than 9A on a 12V line. You would be able to run this proposed system on a 300W PSU, adding in some headroom might be worthwhile but only up to the ~500W mark. A Seasonic or one of it's rebadged siblings (Corsair) or an Enermax would be more reliable, cooler, more efficient and a whole load quieter. If you want SLI, you only need a spare 105W overhead but SLI is inherently inefficient both electrically and from a manufacturing aspect. You'd be better off replacing the card rather than buying another obsolete one to run as well.
Lee_Stricklin wrote:As for the fans: they should get the job done, they have decent motors and because they're aluminum they can almost double as a heatsink.
I wouldn't say the motors on them are that great. They're basically a very cheap unit that's built out of aluminium for marketing rather than performance reasons. Aluminium is not a good material for fans making them loud. They also won't work as heatsinks, things don't work quite like that.
Lee_Stricklin wrote:As for the heat sink: my dumbass didn't realize exactly how HUGE this was going to be until I took a look at two 120mm fans side by side. The worst case scenario would be me cutting part of my side panel and replacing the section with mesh. Thanks for your input.
The GeminII is a top down cooler which are generally considered inferior for CPU cooling compared to a tower cooler. Their only advantages are that they can fit in a lower profile area (my SG03 has one) and that fan airflow also cools components on the motherboard. The GeminII itself is a pretty average top down cooler despite being so big. The big Noctua top down cooler is probably the best out there but the price reflects it.
Lee_Stricklin wrote:Sparkle Nvidia Geforce 9800 1GB
Not sure about this. The extra video RAM is unlikely to be a major help. Unless it's going for a similar price, steer clear. Even if it is a similar price, make sure it's using the same spec of RAM chips as the 512Mb. Frequently high-RAM models have lower spec RAM modules with worse timings. This may not affect clock frequency but may lead to lower performance and no overclocking potential. These cards also potentially use more power and may have unusual board layouts that prevent replacing of graphics card cooling with a simple off the shelf solution.
Be careful with 9800GT specs in general. If it's a 65nm card, leave it in 2007 where it belongs. These were just rebadged 8800GT's. More modern cards are 55nm.