I love my Sapphire 7950. It's been one of the best video cards I've owned and have used in any build that I've done. I've used back Radeon 9800 Pro, 2900 XT(Sapphire), 4850(Sapphire), GTX 560Ti, GTX 570, 7770(Sapphire), and 7950(Sapphire).
I know it seems like i'm set on Sapphire, which I am, but why switch when I've had nothing but success with them.