If you had to...

[God Mode]

I wouldnt even buy ati cards if xfx didnt rebrand them. I had issues with sapphire and asus in the past. I'm not going to bother at all with the lesser tiers.

 

[Scali]

I've owned various brands of ATi cards, and never really had a problem:
ATi themselves... back when they were the only ones.
Sapphire, since they're *the* ATi OEM to me, I believe they've been around the longest, and have the strongest ties to ATi.
Club3D, because they're usually the cheapest you can find here, and they deliver solid reference-design cards for both ATi and nVidia.
Asus, also solid reference-design cards, usually with a good overall bundle of software and hardware. But you generally pay a bit extra.

 

[nemesismk2]

I usually buy HIS video cards because I like their ICQ Cooling and for Nvidia I always used BFG or XFX.

 

[Farmer]

Hmm, after hearing this I'll try XFX for my next ATI card.

 

[drunknmunkys]

Any of the major brands. If it's noticeably cheaper, its probably for a reason.

I'd get pretty much anything besides Powercooler. I usually buy Sapphire unless there's a good reason not to since they're had such a long relationship with ATI.

 

[nyker96]

XFX first choice if price acceptable. normally they are too expensive, but they are the best.
second would be HIS maybe or MSI for me.