Hi, I recently had my pro stolen, early 2013 model, 2.3ghz, i7, 600gb hard drive, 8gb ram. I'm considering switching to an air. There's a second hand shop here has an early 2013 air, 4gb ram, 128gb ss hard drive, 1.7gh processor... they say it's just as fast as the pro, because of the solid state drive. I do a bit of graphic work, so am a bit worried about the size of the drive, after os and apps, I'd be left with only 80gb or so. I could suppliment with an external... so, just not sure whether to get another pro, or go for the air. The size and weight is definitly a good factor.