I gotta agree with r2rX. I have an ATI 5870, and went back to using an Nvidia 9800GTX+ because the ATI drivers were so buggy. Buggy not just in Wine, but in native Linux apps like Boxee too (tons of graphics artifacts on startup... hangs in some native Linux games). Take a look here - https://launchpad.net/bugs/bugtrackers/ati-linux-bugs to see what you might be getting yourself into before you buy. In the past, I kept re-installing the ATI card and giving it another try every time ATI announced new & improved drivers, only to be disappointed every time. So, a couple of weeks back I finally bought a PNY GTX465 and relegated the 5870 to forever stay in one of the kiddos' Windows machines. ATI's definitely making improvements, but I still do not consider them to be up to the point where I would not *highly* recommend against buying ATI cards to any friend considering their use with Linux. If you absolutely can't be dissuaded, please file as many bug reports as you can - not just in the Wine bugzilla, but with your distro, the unofficial ATI bugtracker, and any other ATI related feedback area you can find. They need as much data as possible to know where they should concentrate their fixes.
