A few further questions:
- I see the 8800GT on the Apple store but not the 3870, not to mention, you can configure a new MP from the store with the 8800 but not the 3870. Why is that? Does apple have better support (driver wise) for one or the other?
- Would the 8800GT also have the same problem as the 3870 where you can't re-install Leopard?
- I really dislike how the 3870 vents the card's heat right back into the case. Is it possible to use aftermarket coolers that are available for the PC version of this card or are they too different?
3870 isn't officially offered by Apple, it's only a third-party option. Just as the 8800GT isn't officially available from anyone but Apple.
8800GT with a NEW machine will have the proper drivers on the restore disk.