I have been boxing on Mac since 2008, and all I can do is give the inevitable answer : the functionalities brought by Windows-only boxing software are so incredible that I don't see any way around Bootcamp.

The Windows 7 drive in my Mac Pro is used *only* to box WoW. When I play single characters (mostly traders) or other games, I stick to Mac OS. Yes, ISboxer is good enough to justify using Windows.