1515 neu motor question

How hot is it where you live? If it's not to hot the smooth might be nice for more gearing options. I live in alaska and the summers are about 70deg not very hot at all so the smooths are appealing to me since I like using the smaller 13-14-15 tooth pinions. Plus if you do get a smooth and it runs a little warm toss a fan cooled heatsink on it. Smooth cans are real nice!