i will not be overclocking the cpu, so im hoping the stock cpu cooler will be enough.
i also plan to run windows 7 64-bit.
build comes to about $925 from that website. i'm in australia, and it was the cheapest site i could find.
You don't have a DVD drive, but I assume you are re-using an old one?
As for the CPU/GPU combination, it looks good. 7850 is a very good base to build on, and the CPU will perform quite well despite being locked.
The only concern is that H77 chipset does not allow for CrossFire, which limits future expansibility. If you don't plan on ever CrossFiring, then it's fine, but it means when 7850 isn't enough anymore you'd have to replace the whole card.
That's good, can't install Windows 7 without a DVD drive
A 7850 should be enough to play all current mainstream games at high-ultra settings, and will be usable for at least 2 years down the road. It can also be overclocked like a champ. I don't know what games you play however - if you could mention some it would be nice.