Actually I'm wondering the same.. I have to choose a HD7950 between these brands:

* MSI Twin Frozr.......$320....880Mhz
* Gigabyte...............$320....900Mhz
* Sapphire Vapor-X...$305....850/950(Boost State) MHz
* XFX.....................$330....900Mhz

Any review would be much appreciate it, I already decided to invest in 6 of these cards.. which one do you recommend and why?