I'm slow to join the ranks of pour-over drinkers, but I'm here now. As I research which kettle to buy for my set-up, I'm stumped as to which kettle to get. I know I'm going to get a goose-neck electric kettle, but the questions that keep popping up in my head are: is a variable temperature control necessary? And, assuming it isn't necessary, which is simply built better? Based on build quality alone, it seems that the Hario is the better option, am I right about this?