The prices really aren't that out of line with the options that come on that beast.... A PC specced with the exact same components probably wouldn't differ more than a few hundred dollars if purchased from say, Dell. And the video card support for OS X is a bit lacking, therefor the offering's aren't exactly tops. I think in the near future we'll see DX10 cards fully compatible with OS X, 8800GTX/R600 8-core Mac Pro's FTW!