Need some advice on which MBP I should buy. I'm replacing my home laptop. It'll be the only laptop in our house. I currently have a MBA at my office and love it which is why I'm dumping my Dell and going with Mac for my home. Not a gamer, but will do some DVD ripping, photos, music, web, and some non-intensive games (civ, etc) Do I need one of the 15" with the new ivy bridge, or would a 13" be sufficient? Will probably upgrade the ram to 8gb regardless of which one I get. Just don't know how far up the ladder I need to go. Thanks!