Macbook pro, 13.3 or 15.4?

+1 on the 13" MBP.

Late 2011 2.8GHz Dual Core i7, i dropped 16GB from Crucial in it, and I'm able to run both PS CS6, LR4, a bunch of safari windows, Mail, and move huge chunks of data using Transmit simultaneously with zero bogs, unless I am 2fingering it through a very long filmstrip in LR, then I hear the fan kick in and I notice the load speed in LR drops a bit, but beyond that, It is a champ!