I'm about to make my first venture into the Mac world(other than iPhone, iPad) after years of PC and Windows Administrator work. I do quite a bit of work in the graphic design world outside of my 9-5 job and it looks like this is the route I want/need to go. Currently I'm looking at the following configuration: (from the online store) 27" Core i7 4MB RAM (plan to add more, question upcoming) 2 GB graphics card 1TB SATA drive Here are my questions: What exact RAM specs for this configuration do I need to get to upgrade to 12 GB? Should I go to 16? (I know that last part is probably a loaded question) For those who do graphic design work (Photoshop, Illustrator), do you prefer the mouse, trackpad, both or something else? (examples or explanation with answers to this question would be appreciated) Thanks in advance for the responses.