I just found this thread while searching to see if anybody had tried dual 9800 gx2's in an SG01. That's my review from newegg that was quoted up above, I've changed a couple things since however.
I replaced the power supply with a 650TX corsair unit which is great for most cases, however its fan barely spins up until you are pulling 300+ watts through it. My CPU now overheats (and by overheat I mean 80+ C) at 100% load with the new lower airflow power supply and no fan, so I had to figure out a way to give it its own fan.
I had a Thermalright SI-120 kicking around, and I removed the 2 small support bars and was able to carefully bend it by hand down to the 86mm to fit under my power supply. With it bent to that level, there is a perfect amount of space for a 92mm Nexus fan BENEATH the fins of the heatsink, blowing upwards through the fins into the power supply.
wires everywhere I know, it is still a work in progress. click for high resolution ratsnest
Works just fine as is, but I am probably going to pick up a Scythe Kaze Jyu Slim 100mm fan and use that instead. The old SI-120 worked just as well as the NT06-E did so I just sent the NT06 back. For a new build though since you probably won't have or find a SI-120 just pick up an NT06 and a slim 92 or 100mm fan if you have a hot processor and/or a low flow power supply. Lowered my temps 20C.
Also I would shoot an email to Silverstone about using the NT06 on an LGA1366 board, they have been responsive to my questions and I would be surprised if they didn't have SOME kind of recommendation for a SG01 i7 build.