I would reccomend the upgrade to an Intel only if it were critical. If you’re using AE 7, without 3rd party filters, you should be OK – however if you’re going to use Boris, Trapcode, etc. you’re going to run into difficulty. I think, 7.5 should address the issue and will feature an Intel native platform but in the interim, in retrospect, I’d run AE on the non Intel chip set only and reserve the Intels for FCP.