I bought at the end of December 2010 the 27" Imac i3 processor and upgraded to 12GB memory for an additional 110 dollars (Newegg) on top of the 1,550 dollar price that I bought the computer for. My computer runs fine with big photo projects like having 10 full res 5D2 TIF images open at once in Photoshop along with all the other stuff I have it do. I don't do any video editing and probably never will so I can not advise you on that. All the extra stuff that you have your eye on will just be the extra icing on the cake. The only bad thing about the imac's is the glare that comes off the screen but that is minor really as the screens are amazing. Just don't have your work station in a room with a bunch of big windows or a really bright light in the ceiling. I feel that the lighting around your work station should be controlled/limited anyways but to each is own.