So, I'm a bit of a noob to pc's. I'm looking to build my first pc for gaming/recreation. Right now I'm kinda confused as to what PSU i should buy. I'm trying to keep my budget under 800, so i'd like to get a case & psu for under $100. So far, taking advice from a couple of friends, I've ended up with this build:
450w is the minimum power supply for the 660gtx; I've gotten nearly all my rebates, but some folks aren't so lucky. I recommend you wait until the week after xmas to order, unless you find a newegg shellshocker special before then. Prices are a little high right now.
You might want to consider getting a cheaper motherboard. You don't need the Extreme4 if you're only going to use one graphics card. Then you can afford to get a better case than the Cooler Master Elite 430.
I have both the case and PSU and have not had a single issue with either. I have all 7 fan spots filled out on my case, and the temp never goes above 28 degrees load(ambiant temp). I was really surprised on how good the build quality and cable managent was. I changed from a modular to a non modular PSU and it was super easy to route the cables in the space provided. Side installing the HDD's was awesome too, after coming from an older case that put the HDD's cables facing the motherboard lol. The PSU has my PHII x6 at 4.0ghz, and my HD 7950 at over a 200mhz OC on both the core and memory without issue.
PS: On the top of the NCIX page it says free shipping on orders over $50 so that would save a little cash as well.
I know that this combo would go over your budget, but you would be getting a top notch PSU that will do you for a long time and should suffice for any upgrades you may make in the future, and a case that should really be priced closer to $80 for the options, and cooling it provides.