I don't have a 7950 but I too am considering purchasing one, the one that has caught my eye is the XFX 7950 with double dissipation. Find it on NCIX and check out the unboxing video, it's pretty good looking. I also like the looks of the sapphire card. They can both be overclocked quite nicely.http://www.hardwarecanucks.com/forum/hardware-canucks-reviews/51109-xfx-hd-7950-black-edition-double-dissipation-review.htm
I'm sorry if the link doesn't work. I'm on my work computer and our web access is quite restricted so I found this on my phone and manually typed out the link.