Wirelessly posted (Mozilla/5.0 (iPod; U; CPU iPhone OS 4_3_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8G4 Safari/6533.18.5) Hello All, I have been considering purchasing a new iMac after the immanent update. Hhowever I've recently put the option of a MacPro on the table. My primary use for the computer will be video editing. I'm concerned that the mobile GPUs in the iMacs won't give me as much bang for my $ as the MacPro. Also I like the upgradability of the MacPro vs iMac. Any pros here with wisdom to impart?