What do you think is the most probable future BTO graphics option (eg. for the Nehalem generation) mac pro? I would like to add one of the two new ATI cards (HD 4850 or 4870) in my mac pro to use in Windows. I would like to replace the 2600XT completely and flash the new card for mac once there will be a version with an EFI-ROM (which probably will happen sooner or later, like the 3870 now) and therefore I want to get the card which is more likely to appear as mac version in about a year. Will it be the 4850 or the 4870? Any guesses or ideas?