well, up until about 2 weeks ago i would have said XFX were pretty decent. the shortlist now contains Gigabyte, MSI, Sparkle, and ASUS.
problems with the XFX unit:
-<b>!!LOUD!!</b> cooling fan
-48C at idle, 76C loaded, in a thermaltake case with 6 case fans!! no excuse for it.
-didn't even break 3000 on 3Dmark05 despite the A8N mobo, AMD 64 3500+, 2GB @400MHZ, a a SATA 160GB HD.
maybe i'm expecting too much on the benchmark but the noise and the temperatures are just rediculous.
know your limits, and never stop trying to exceed them!