Hi All- Can't decide whether I should do the 7600GT upgrade. I know it's inexpensive, but it's a big purchase for a college student, plus if I go with the lower video card I can buy the iMac in the store as opposed to waiting two weeks. I'll upgrade ram later when I have the money. Going from a 20" Core Duo with the 256mb X1600, will the 7300GT 128mb have similar performance? I'm a media arts student but am not doing intensive video work, I do medium level Final Cut Pro and Adobe CS work. The 256mb X1600 on my Core Duo iMac now works very well, I also output 1080p video to a 40" plasma TV (via mini-DVI to DVI to HDMI). Thanks!