I'm trying to decide between the 21.5" or 27" imac and my main concern is the fan noise of the 27" due to the i7-7700k. The 21.5" I can get the i7-7700 that is only 65w chip rather than the 95 of the k. Could I do 40-50 tracks of mostly vst synths before the fan gets super noisy? Am I better off going with the i5-7600 mid tier 27" ? If the noise doesn't happen until the track load is high then I might want to get it but I'd rather not deal with fan noise. Does anybody use the 21.5" 4k with the i7-7700 (non k) for Music production?