After 3dLabs stopped making their Wildcat boards, I tried ATI. They really sucked because of bad Catalyst drivers, especially OpenGL drivers. They released new bug fix drivers every month and just moved the bugs around.
I switched to nVidia Quadro boards and have not had a single problem. Their drivers have been rock solid for me. I even have Quadro NVS chips in my notebooks.
Back then I had 22" Viewsonic VP2290b (3840x2400) displays to feed and there weren't many choices for video cards.