Price aside, the issue with the Mac Pro right now isn't the CPU: the Nehalem/Westmere's are more than enough CPU for v10. The problem is the last officially supported GPU is the 5870, which v10 is more than capable of bringing to its knees. It's possible to run the 6000 series ATi cards in the current Mac Pros, but that family of cards is an incremental improvement over the 5000 series. The 7000 series, however, is a whole, new beast. People poking around have found references to the 7000 series cards in the 10.7.4 developer releases, but to my knowledge no one has yet gotten one to work in a Mac Pro. if Apple does kill the Mac Pros--and I hope to God, or whatever, they don't--then Mac users will face the real problem of becoming second-class citizens in the X-Plane world simply because of the lack of GPU options. However, if Apple does introduce new Max Pros at WWDC, with the 7970, I will be first in line to buy the new card. edit: looks like, even if Apple does kill the Mac Pros, if the new iMacs ship with 7000 series cards it's very likely one could use the .kexts to power 7000-series cards in MPs.