I purchased an ATI HD3870 in December and although it was great in games, the performance in Blender was abismal. This was prior to the latest driver which reduced the OpenGL select time. I therefore returned the card and bought an 8800GT.
Previous to the 8800 series purchase, I owned an ATI x850XT which actually worked great with Blender in WIndows and Linux. I really would love to purchase an ATI card if only to help support the underdog.
My question is this: does anyone have any experience with the new Ati 4850 cards and Blender? Has anything changed in the card / drivers to close the performance gap between Nvidia and ATI with Blender with this card?