depends on what board you are putting them on. unless its a 3ds/pulse or sub VI i would say ride it without the fins. you dont really need them. but then again i have been riding the roam and nothing else for about 4 years
It depends on what you want the board to ride like. A-Wings will give you a tighter feel and release off the wake a little later then a P-Wing will. The P-Wing will give a looser feel.