What's wrong with the FOSS radeon driver? I've had no trouble with it
(mach64 and now 9250). 3D is fast enough for my purposes, 2D is blinding
(and is now even faster thanks to a not-yet-committed patch from Michel
Dänzer to defragment the EXA glyph cache)... I've had a total of one crash
in ten years, and that was due to a device-independent Mesa bug.