I like the Gigabyte 7950s, and actually have 7 of them, but they do run hot inside a case if you don't have very good airflow.
Whichever card is plugged into PCI-E slot 1 also seems to run very hot, so they do much better in an open case using risers.
They come factory overclocked at 1000/1250, and do over 600k mining litecoin without additional over clocking.
I really like these cards, but keep an eye on temps if you use them in a closed case and plug the cards directly into the mobo.
They suck a lot of power though. At least 50w more than other 7950 cards. I guess the extra KH has to come from somewhere.