I was a little worried that the HDD would have heat issues given the small amount of airflow it must get coupled with the mess of SATA cables around it. However, HWMonitor has never shown it above 40C, which is apparently decent?
I realize the PSU is overkill, I hope to upgrade the video card / SLI / overclock in the future once the system starts to show it's age. Plus it was only $10 more than the 650W unit, so why not?
The HAF 912 is a great case; you can really tell Cooler Master has got their **** together. I removed the upper HDD cage and hid the extraneous power cables in the little 2.5" cage, so the interior of this thing is fairly cavernous. Only probably I had case-wise was that one of the little rubber feet that hold up the PSU broke off, but I don't think it's a huge issue.
If you search for 200mm fans on Newegg, take note that some non-200mm fans come up on the first page of results. I bought an additional case fan thinking it was 200mm, only to find that I overpaid for a 120mm fan. Oh well.
It's louder than I expected, but I guess that's the price to pay for having 5 fans total.
This is the first machine I've had that could run Half-Life 2 at full settings :D