Radeon X1600 (256MB RAM) vs GeForce 7300 GT (128MB RAM) I am considering getting the 24" iMac over the 20" iMac if the GeForce card is comparable to the 256MB version of the X1600. I have looked for performance tests, but most only compare the GeForce card to the 128MB version. Does anyone have a performance comparison I can look at? What are your opinions? If there is a performance cut, does the larger/brighter screen justify a graphics performance cut? As for my intended use of the machine: I will be using print/web design programs (Photoshop, Flash, etc) heavily along with some mild gaming.