Hey guys I really want to know your opinions regarding this purchase, i think the biggest difference regarding the new models is the force touch trackpad (maybe not?) but also the dedicated gpu. Considering the price difference i don't know what model is the better purchase and if the dedicated gpu is worth it, my experience with laptop and gpu is not good with a lot of heat and video issues/damage (i live in a island in the caribbean so heat whole year lol). Basically what year would you recommend and if there is a big difference in performance, i expect this machine to last around 4 years and I'm currently using a MBA 11" 2011 that have been flawless but i need a bigger screen this time. Thanks in advance !