Yeah, sounds like the G5 will be needed, since Steve made this comment, "If you have a system bought within the last year, and it was a decent system, I'd guess that you'd meet the minimum specs." (Quote from post on System specs). I'm looking at some of the newer G5s, and it sounds like the Dual 2Ghz G5 with the ATI Radeon 9650 (256MB VRAM) could make the cut. Now the question is, will CMx2 take advantage of Dual CPUs?