I've only used ATI so far... no problems that I know of.  I guess with Vista though we'll need that 1GB of video ram :P
8500DV AIW AGP 64mb
x850pro AGP 256mb DDR3 - this card is a gem too.
x1950xt PCIe 512mb DDR3
http://www.tomshardware.com/2007/06/11/the_best_gaming_video_cards_for_the_money/page3.html
So what if they don't take every price point?
Considering that I see alot of games with nVidia splash screens/logos I think there's more to any percieved problems than meets the eye.
http://www.tomshardware.com/2007/05/14/r600_finally_dx10_hardware_from_ati/page26.html