I'll make this short I've ordered my first MacBook Pro last night, it should arrive on wednesday and I'm really already too excited! I chose the 13.3" baseline model as my TOP priorit was portability. My lifestyle obligates me to carry a massenger bag with plenty of things that already make it heavy. (iPhone, wallet, charger, notebook, swissarmy knife, etc..) I chose to buy a MBP because I'm a computer science major and sick and tired of dual booting windows and Ubuntu (for compiling and commandline). Also, I want to enjoy the good graphic design software to complement my photography hobby and web design. "Also", I wanted to enjoy the sound and video editing software. (Adobe Soundbooth, etc..) I mainly use computers for browsing and programming, second comes the design and music part. The 15" is def. too heavy/big for me to carry around ALL day.. (I mean, ALL DAY).. Would I be at a disadvantage when it comes to the processing power different of the CPU and GPU of the 13.3" compared to the 15" ? My last laptop was a Dell Inspiron 6000 (bought is like 6 years ago!).. Tell me I'll be doing fine with it.. (won't be disappointed if it's a big difference).