1ST BUILD, NEED HELP WITH COMPATIBILITY

Reasonable, but here are some thoughts:

1) If this is a gaming system, then a 2500K or a 3570K will be a similar performer, and be $100 cheaper.
If you are running multithreaded apps, then the 2600K or 3770K will be better.

2) I would look first to a more modern 28nm video card. They take less power and run cooler. Something like a 7850 or GTX670.

3) 90gb is a bit small. 120gb would be large enough to hold the os and a handful of games. I like your ssd/hdd strategy.
My preferred brands for reliability would be Samsung 830, or Intel. crucial would be a third choice.
There is no real difference in performance among any current ssd's.

4) I would suggest a 8gb(2 x 4gb) ram kit of ddr3-1600. Buy one with low or no heat spreaders.

5) Buy a $30 cpu cooler. CM hyper212 is good.

6) Take the time now to download and read, cover to cover the case and motherboard manuals.

a few things:

1. the 480 destroys all competition at it's price point. keep it unless you can spend more for a 670. your case etc should handle the 480 just fine.

2. I agree with 90gb being too small. it's workable. eitherway, I would prepare to buy a 500-1TB HDD minimum

for everything else, I agree with gelfelt completely

Thanks guys, I really appreciate the input. I'll def look into the CPU cooler as well, I wasn't sure if I'd need it or not, since I won't be overclocking for a while until I'm sure my setup is all correctly installed, etc.

Update: Just ordered the CPU cooler.

With the i7-2600k reduced to an i5-2500k and the SSD removed, he can afford the GTX 670.

Good...
The stock cooler can get noisy as it spins up under load. A cm hyper212 uses a 120mm fan which will be quieter under load, the better cooling is helpful when overclocking, allowing higher levels.
Also, the Intel pushpin mounts are tricky to get tight for the new builder. The backplate mount of the 212 is much simpler.