I bought a 13" mid-2011 MBA for school when it first came out. Now that I'm in grad school I'm finding I truly hate Microsoft Office 2011 so I've been running Parallels 10 with Windows 8.1 for things like Endnote, Office, Quicken, etc. However lately my MBA is struggling to keep up. I have a chance to buy the late 2013 13-inch MBP with i5, 8gb ram, and 256 ssd for $900. Is the retina, extra cpu and ram, and usb 3 worth this? Thanks!