<p>This is a YMMV, but I really don’t feel there’s much of a weight difference between a 15" macbook pro and a 13" macbook. </p>
<p>Then again, I attended college in the mid-late '90s when the notebook computers I used for school averaged around 9-11 pounds with adapter…and screen sizes ranged from 10" - 12.1". Nowadays, I still sometimes carry around a 14.1" notebook weighing 9.5 pounds including adapter because it’s a notebook I can afford to damage/lose when traveling. </p>
<p>Considering all that, a 5.6 pound 15" macbook pro is optimal for me from a screen size/weight ratio. </p>
<p>Then again, I am nearly 6’ tall and used to routinely hauling 15-20 pounds worth of notebook and other school stuff during my college years.</p>