Dear fellow Apple fans, I googled "new mbp 13 vs used mbp 15". I could not find a similar discussion. Please forgive me if there is already such discussion. My boss just gave me his MBPr 15" 2012 model. It was a high end model fours years ago with I7 (Ivy Bridge) CPU, 16GB RAM, 512GB SSD. It seems still worth $1000+ on eBay. The question is: should I sell it to purchase a new MBPr 13"? Especially the one is coming soon? Which one would you choose? Or is it simply a choice of screen size vs newer technology? Thank you very much for any suggestions! May the Mac updates coming SOON!