I bought a G5 dual 1.8 a while back.. it was ****in nice but it cost me nearly 2k .. I didnt use it for anything except Cubase, which is exactly the same on mac and pc, so i figured i had paid about £1000 extra for some aluminium and a better OS than on pc. So i sold it and went back to PC with a grand in my pocket.. and to be honest, if you are only using it for one task - its exactly the same!

But if i was using loads of software, and actually used the OS at all i would probably have stuck with it as it much nicer than pc really.

But for pro tools i dont know. Ive heard its a bit shakey on PC