I am getting ready to go down to my local Apple Store. I am buying a mac to use with Aperture. I have the option of getting the 20" intel imac with the upgraded graphics card. (they stock it) Or, buying a G5 Dual 2.0 and 20" Cinema Display. I do not mind paying the premium for the Powermac. But, is it even faster than the imac in Aperture? I know Aperture is big on Graphics cards, and I am not sure which is better. Can someone chime in quick... I am looking to go down there asap. I did a search and could not find anything... Thanks!!