Good morning, I'm new to this forum because I want to buy a late 2015 27" iMac. While I don't want the i7 due to heat problems (I want the machine to last as long as possible), I'm not sure about the GPU yet. Of course the M395x would be the best choice as I want to keep the machine some years, but does it also overheat or is that just a problem of the i7 CPU? Does anyone have an i5 with the M395x and already measured the temps? If the combination of i5 and M395x also leads to overheating problems, I would take the M395 GPU as I haven't heard yet that that model gets too hot. Thanks for your help.