Reply to Which macbook Pro for Traktor S4 - 15", 13" or Air?

Anyone have any screen shots? I am believeing of upgrading my laptop to a macbook and I am really in a bind.

I will use this laptop for surfing the net and Traktor S4 so it does not need to be loaded with i7 cpu with 8 gigs of ram. Here are the downsides to my selection.

1. MBP 15" - expensive and big/heavy for travelling which I do alot of.
2. MBP 13" - Not sure if S4 software will look good on this screen or if it is too small. With the browse button this might be it. I need to see a screen shot of a 13" MBP with 4 deck control and all the options like grid control and faders. Probably my first choice since the air has some downside too.
3. Air 13" 2.13Ghz - Only two usb ports, but screen resolution is same as 15". Need usb for S4, X1, external hdd so I will need a powered usb hub.


Any thoughts and also pics of possibly the S4 software on a 13" mbp and the new air if anyone is currently running that.