I think X.org is worth a shot, my card is a Fire GL and not supported.
Maybe you can get a better result with your card. I contacted ATI for
64bit fglrx and they told me that it is still under development
(unfortunately they were not willing to hand out a beta version).
Yes, I tried it yesterday. I grabbed the sources (X11R6.8.1), compiled
and installed them without any major problems. Nevertheless the X.org
driver is not faster than the one from XFree for my ATI video card :-(
I would have tried if for my ATI too, but if you say this... I'll go
on with my vesa :(
(still waiting for 64bit flgrx)