Just my personal opinion:
Tier 1: ASUS/EVGA (If you can afford it, sure!)
Tier 2: MSI/Sapphire/HIS/Gigabyte/XFX (Good Options)
Tier 3: Powercolor/Zotac (meh... I'd probably opt for a lower powered Tier 2 than one of these)
Again, just my personal opinion.
-Wolf sends