[ggegan]

If you go with HD Native, which I think makes sense for editors and mixers who don't require more than 256 voices, then you will need the most powerful computer you can afford. My tests indicated that an HD Native system running on the current 12 core Westmere Mac Pro is at least the equivalent of a TDM HD6. That's a $3500 computer, add $350 - $500 for enough RAM to utilize PT 10 RAM cacheing of audio files and another $300 to fill the drive bays with 1TB drives.

If you are planning to go with HDX, you could probably go for the $2500 Mac Pro, because the HDX card will be doing the heavy lifting. Even if you use Native plugins to a high degree, I think a Quad Core Mac Pro will serve you well. Just make sure you buy a new or used computer that is at least a Nehalem or Westmere, word has it that Harpertowns are not compatable with HDX.