New to the forum, new to MBP, need some wise advice. Been a long time desktop user running mainly Cubase, been out of the music production thing for a few years now, want to get back into it but have the urge to go portable now that lappys are fairly cheap ( I said fairly ) and very powerful. I have set my heart on a MBP I want to run Logic, probably just the Express version to start off with as I have never used Logic before. My main worries are firstly, screen space and secondly, processor power. I have done a bit of research and the nice guy at my local Apple store had Logic Studio up and running on a beefed up Quad Core tower, was very impressive but they unfortunately didn't have Logic on any of their new MBPs yet. The nice man scaled the screen down on the Quad Core machine to a size that was around 13" so I could get an idea of how it might look on a smaller MBP, it seemed to look good, alot clearer than I had imagined but I am worried I might regret not getting a bigger screen later on. I realise I can always output to an external screen if I am struggling with it but then I lose my portability and I liked the idea of putting a 13" in a bag, grab a small controller keyboard, headphones and making music on the bus or at a McDonalds or at a graveyard!! I can only realistically afford the top end 13" MBP but I could scrape enough together for the bottom end 15" one if I put in some extra hours at work. Onto to my 2nd worry, and I'll keep it brief, processor power. A 2.53GHz 13" or 15" MBP...is that a pretty powerful little machine right there? And is the £200 leap from 2.53Ghz to 2.66GHz on the 15" really, honestly noticeable when running an intensive program like Logic? I think that's all, I've read that the 13" lacks a dedicated graphics something or other that the 15" and 17" have but I won't be using it for gaming or video editing so is kinda wasted on me, am I right on that or have I missed something? Really appreciate any replies, cheers.