I am wanting to purchase a 15' macbook pro but not sure of the 3 choices on the Apple site which to get. I am a musician, so seeing Garageband coming with the MBP was a big selling point. I am not a photography or video guy. My wife does that, the only thing I would use video for would be to record something and put it on youtube. I am not computer savy, so I don't know how big the difference is between the 2.53 GHz and the 2.66 GHz. Or if there is a big difference between the i5 or i7 Processors. Or the mb storage between 256 and 512. If I am going to spend over 2 grand I just want to make sure I have enough storage and memory for what I intend to use it for.