Now that the keys are cross-platform compatible, I'd really like to get a copy of the Mac version to see if it offers acceptable performance. I got the PC Collector's Edition on release, and I love playing with everything maxed-out, but I'd love not having to reboot even more. I've only finished one play-through because I just can't be bothered to reboot to Windows very often. It would be nice if EA or the distributors would allow us to download the Mac version if we have the PC version registered. I've yet to find a working download of the Mac version without buying the game again.
As for Awakening, after reading the reviews, I'll be holding off purchasing for a few months and hope for a Mac version.