So I have the 2015 base version and currently down to 9 GB for my Windows 10 partition and 20 GB for my Mac partition. I have been looking at 2016 version (M5 with 512GB) and wondering if I should stick with my base unit or is there enough of an upgrade with the latest M5 version. I keep hearing it's only about a 15% increase in speed and not really enough to notice the difference, but wondering if anyone who had a base 2015 unit has really noticed a significant boost in performance? I'll give you an example - I play Ori and the Blind Forest on my 2015 Macbook on low settings and in windows mode in order to actually play it smoothly. Would the latest version at least play smoothly at 1280x800 in full screen? That would show me there is definitely a significant upgrade with the latest version.