So I recently bought a selection of 7950s... and ended up returning most of them... except for a pair which I kept (and another pair which I've since sold, because I missed the return date).
The one's I kept were the vapor-x from sapphire absolutely the best card out there.
HIS w/ iceQ is the close runner up.
reference is 3rd best.
Gigabyte is ok... but don't expect to mine with them in a case. These guys need aftermarket cooling on the backside or extender cables so they don't cook whatever happens to be near them.
avoid everything else unless you're planning on watercooling.