Ive searched the forums but found not very recent info: what is the very best graphics card i can get for my MDD Dual 1.4 I believe it is AGP? if the slot iti s in is AGP, then what are theother 3 slots...im not sure how these slots work so also some basic info would be nice. I have a Nvidia GeForce 4Ti 4600 128mb in it right now. but i would like coreimage support, and support for Aperture! thanks!