Or a Mac Pro, but Macs aren't really built for gaming.
Well I need high graphic capable machines for 3d design / gaming so I've decided to sell my iMac and build a tier 6/7 machine and run linux as my osx replacement.
I'll come back to Mac Pro when I have more cash probably...if they can't be built to handle tasking software they're useless to me =( So I'll have to attempt to build a hackintosh or something later.