I am looking to buy my first iMac and am looking for some good direction in terms of which one to go with. My wife is a wedding photographer and is in need of a new computer to edit on with Photoshop. She likes the 27" so I figured that's where I would start. The computer will mostly be used to edit pictures (lots and lots of them), regular internet surfing, and some gaming. What do you recommend I go with? How much RAM should I consider getting? Any and all information/suggestions are appreciated!