Im considering a processor upgrade from 2x 3.0Ghz Dual core to 2x 2.66Ghz Quad core or 2x 3.0Ghz Quad core. I have a MP1.1 with 12GB RAM, 2x1TB Raid0 Main drive, 2TB TimeMachine. SSD for OS on its way. Just wondering in which programs Id see a performance boost, and how many cores are utilised by different programs. Also, would my slower 667 MHz RAM hold up the new processors? Any advice on whether processor, RAM or HDD speed are most important for each program listed also welcome. Note on current usage: PS files arent huge, but I might have 20-30 files open at a time (30-50 MB files each). I use Lightroom for most photographic stuff, and CS2 (at the moment) for retouching/pre-press. I get 55 seconds for the retouchartists test using CS2. I assume CS5 would be faster. The only time Im really slowed down in my work by the dreaded blue progress bar is during video rendering (Full HD from a 7D) Can anyone help? Lightroom 3 Photoshop CS2 Photoshop CS5 InDesign CS2 InDesign CS5 Final Cut Express Final Cut Pro iMovie HD MPEG Streamclip Thanks.