On the graphics card side, I am leaning towards a GTX580 (had a 6970 and though very decent for th emoney, I wanted something stronger). The thing is, I know with the case design they suggest the reference cooler, but I want to make my rig as silent as possible. After all it will be on my desk 30cm from my head...and after overclocking, I don't think the stock cooler will be quiet enough... Moreover I don't plan on SLI-ing so I got all 4 slots open and I think a decent cooler even though dumping heat in my case will be ok to stay silent...
If using up 4 slots doesn't bother you, use an aftermarket cooler like a Thermalright Shaman or Arctic Cooling Xtreme Plus (AXP) on a reference GTX580 or buy a card with a pre-installed cooler based on the AXP. Both are very efficient and extremely quiet.



