I had an extreme and went to the PTM. The mount for the extreme can be used on the PTM, which cuts the price slightly. The PTM has a superior field of view without question.
Previous: 1993 Prostar 205
Red 1998 Ski Nautique, PCM GT40, 310 hp, , Acme 4 blade, Perfect Pass SG/Zbox.
Be kind. Have fun.