I'll vouch for that one. My new Opty @stock speeds is very quiet, cool running and fast.
New Specs:
DFL SLI Expert
AMD Opty 165 w/stock cooler
Western Digital Raptor 36
Corsair XMS 2X512 @stock
XFX 7800GT (#2 coming soon)
Antec TP2 550W
Gonna test it @stock speeds and with a single card. Then OC it and test it with dual cards. Very nice machine indeed.