Hey so I was able to get some benchmarks knocked out at my local bestbuy which had the new models out on display. They were originally locked from being able to install anything but the apple rep was there who let me install the new software on the macbooks and he was very patient! Anyways, here's a run down of the performance I got of each model. I only tested unigine Heaven 4.0 as I didn't want to waste more of his time and have all the macbooks in use. So here's the run down, I almost attached photos of each. All tests were done at Medium default settings in OpenGL at 1440x900 except on the 13 inch retina which wouldn't go past 1280x800 Macbook Air 13 Base model. (had to stop test about 70% of the way for a customer) 15.6 fps rMBP 13 with i5 2.6 (1799 model) 21.2 fps 2 Things of note, the processor gpu is at 1.2 instead of 1.1ghz on the i5 which is about 10% more performance, and it would only run at 1280x800. I would best the comparable performance would be closer to 19 fps if all things were equal rMBP 15 Base model 27.5 fps rMBP 15 with 750M 28.5 FPS My gaming desktop with i5-3570k running at 4.3ghz and stock Nvidia 760 gtx 82.9 fps just for comparison sake. Temps for all the models were looked like this. 13 inch air, 78c 13 rMBP, 72c 15 rMBP base, 69c 15 rMBP 750m, 79c Hope this helps in your decision making, I know it isn't a thorough gaming test but it's the best I could muster in the amount of time and patience I was working with. I included photos of each test except the macbook air. Here's a Link to photos I took of all the tests. Here's a Link to photos I took of all the tests.