Hi guys! Will PC hardware such as an M-Audio or Soundblaster sound card work in a Mac Pro? How about a PCIe graphics card? On the Nvidia site, it says "mac edition" on some of the cards - why is that? Is the Mac PCIe somewhat different??? Besides my MBP, I currently have an old dual-core opteron workstation in big box on the floor - I am looking to in 2010 to replace this with either a Mac Pro or new quad iMac.