I would like to buy a new Mac, replacing my oldie (G5 Quad). What you think is the best choice for Photoshop/InDesign CS4, Lightroom, Nikon Capture NX iMac 27" (2,8 GHz) with 12 GB RAM or Mac Pro Quad (2,93 GHz), maybe 6-core in spring... with 12 GB RAM. I also must replace my display.... I don't know how much better is the iMac 27" display against the 24". Thanks for an advice.