The best popper by far is a Stir Crazy popper. $25-30 usually but you can pick them up at thrift stores regularly. A popper full happens in my house most evenings (Yes I buy my corn in 50lb bags)
It has motor so that it stirs the popcorn as it heats. You choose how much oil to add. Much better than the dried out crud from an air popper. Way less oil than commercial microwave popcorn. Very very few unpopped kernels if you have good popcorn (unlike this type of microwave popper)