Medusa Afterburner V2 BL motors

Well I just checked Medusa's website and they are starting pre-orders of the 36 x 70mm and 80mm motors. I was going to get the 70mm for an e-revo but do you think the 80mm would fit? I know the 70mm would push the e-revo just fine but if I bought an 80mm and got a little lower kv would it run cooler and still have about the same acceleration? I'm not looking for blistering speeds, 45 mph would be plenty but I don't want to have to be worried about anything getting too hot. I plan on running Zippy-R 3s 4800mah 25c batteries with the MMM if v3 fixes the problems.