Hi. I'm PC guy. A laptop I am having is Core 2 Duo 1.8GHz T7100, 2GB RAM, 512 GB HDD, running Win7 Home premium. I'm going to buy a new MackbookPro since my laptop is going to die soon (+moving to mac cuz i'm getting bored with Windows ) I'll use it for developing basic iOS App, using Dreamweaver (quite frequent), playing games (not much), listening to musics, watching movies, and surfing the net. My question is I am not sure which model is good for my usage. First time I planned to get the 15-inch: 2.0 but it might be over usage for me. So I am thinking about the 13-inch: 2.3 GHz and 13-inch: 2.7 GHz (I love a big screen but I can connect it to an extremal monitor). If I get the 13-inch: 2.7 GHz, would it be good to get the 15" instead. I can effort the 15 but I don't wanna waste my money to the thing I will not use. I know many expert here can help me . Thanks for your answer.