I'm not sure if Powercolor is around anymore, but I have an open-box-from-newegg Powercolor Radeon 7000 that is still kickin', I've since flashed it to Mac and I'm using it in a Mac G5 web server. It still works great.
I also like Sapphire's video cards, but I refuse to buy anymore of their products due to a poor experience with their tech support/RMA department.
I personally like Built By ATi cards the best, I've never had one die on me. I'm still using a BBA Radeon 9800 and A-I-W VE and they are great.