Now I will need a help to decide which macbook pro to buy for using Logic studio. I'm going to buy one of the 13" macbook Pros. I plan to just by the basic package all together. I would buy an external memory later one. But if i get logic studios will i start to see lag? I don't do any huge projects on it, just recording some normal songs, nothing to big. Any advice on what to get or do with this would be great! I would prefer not to get the 15" or anything else, if thats possible. I just don't want any lag later down on the road. Thanks ahead!