I am relatively new to owning a bass boat. I currently own a 17 ft. aluminum boat and am looking to upgrade. I am curious as to why some people choose a 20 ft boat over a 21 ft boat, other than price? I see this across all brands. If the price were the same, is there an advantage or difference of one over the other? Obviously space, but are there other reasons why people choose a 20 ft boat? Thanks for the input.