What is the best supported framebuffer for sparc64?

I have recently installed OpenBSD 4.7 on my SunBlade 2000 with an 
XVR-500 framebuffer.
The documentation lead me to believe that the XVR-500 as decently 
supported but that
appears to not be the case. It only does about 7bpp and does not have 
much in the way of
acceleration. After looking at the driver I found out that nobody will 
release the hardware
info for this card  so i gave up on it.


I ended up ripping an Elite3D card out of an old Ultra 10 and  that at 
least gives me 24bpp
but there are still lots of problems with it (all OpenGL looks like a 
photo negative,
rdesktop displays in reversed color as well)

I'm guessing one of the ATI chipset based cards would be better 
supported over all
so what I want to know is which card is the best performing and best 
supported currently
on the sparc64 port of OpenBSD so that i can just buy that card and have 
X working 100%.

I mainly use this machine as my primary deskop and want to view movies 
in mplayer ocasionally
but would like to be able to do decent 3D acceleration as well.