I am looking to purchase a iMac within the next few days. I was wondering the following: To those that have had/used both the 3.8 and 4.2 iMac 27" 2017 versions how the fan noise and GPU temp compare to one another? Is the noise really that bad or subjective? Is the fan noise worth the extra processing power? Is the 3.5 a better route to go? --- Post Merged, Apr 24, 2018 --- Forgot to add....I seen this video so I am wondering if the 4.2 is really all that bad?