That's what I have now. Compared to the X850XT pro which I had prior, it's quite a bit better. Personally I think it's over rated. Not to mention that there aren't (to my knowledge) many driver options for it. Also, ATI (AMD) isn't going to update them either. Omega on the other hand has been working on a new set of drivers for it. Release date unknown. To be able to tell you the version of drivers I'm running, you'll have to wait on that till my sim rig gets a new heart (psu) transplant. Which is on the way. I've always used ATI so I can't compare it to nVidia. Hard to change old habit.
The drivers included worked great right out of the box.
With the Radeon HD 3850 I can run max sliders with all settings activated. (fsX, no clue)