I finally pulled the trigger and ordered my Imac: 27 4.0GHz quad-core Intel Core i7 Skylake, 8GB DDR3 RAM, 512 SSD, AMD Radeon R9 M395X with 4GB I went with the trackpad 2, apple care, and a thunder bolt cable, and apple care. Total Price £2617 Price I paid £2229.40 for educational discount 5% AMEX cashback = £2117.93 a whopping £500 saving If i waited for next year, I would have lost the education discount and my AMEX 5% cashback for a new platinum cashback card. The dilemma is whether TB3 and DDR4 were enough of a reason not to upgrade. The main perks of TB3 was TDM, as this gives the possibility of using my imac as an external display, if apple were to contemplate allowing this option again. After a lengthy discussion with apple, and after reading countless articles on the subject matter, i felt the discount i was getting was to great. My question, would DDR4 and TB3 make any other real word differences. My uses include opening safari 5-10 tabs, chrome several tabs, word, excel, powerpoint, light moderate gaming. For my work i do some gpu intensive tasks that my poor ol 2013 rMBP struggles with, hence the need for a desktop. I am well aware the imac i went for is in far excess of my current needs, but thought it would most likely future proof my machine.