It's hard to answer your question since you didn't mention why you want to switch configurations. I have the one you specified and it's a very good machine. However the only reason I bought a fully loaded one, is so I could do some of my mainstream work while on flights to the UK from the US.
If it was a more casual use machine I would have only bought the base model. Overall if not for having to fit on a tray table in the plane I would have never bought it. The 11" display is a pain.
I bought a 13" as well and it's much nicer. When flying first class that is the one I take.