i'm planning to purchase a mac mini, but i'm having difficulty to choose which one suits better to me. i have bought memory and SSD from OWC, it's 2x4GB DDR3 ram and Mercury Extreme Pro 6G and planned to put these beast into the mini. I will use this mini in my office, only for working big 300dpi image with 4000x6000 pixels in size with Photoshop CS5, and nothing else. i'm in between the one with the radeon but upgrade the cpu to core i7 2.7ghz or just get the one with intel HD 3000 and quad core i7. and i'm gonna use this mini with my existing 27" ACD. currently im using 13" mbp 2011 with intel HD 3000 and core i7 2.7ghz dual core. i feel this machine is fast enough but still slow when converting big images from illustrator to png. should i go with the quad core mac mini? does the discrete graphic really help photoshop CS5 to be faster? thanks..