Hi Guys, got one of these myself - the standard model with the bench seats - and want to put a new long shaft Yamaha 4 stroke on it - I just don't know which one - the 15 or the 25. Any of you got one of these, and can you fill me in on performance details - like how fast can you go, how does it troll down, how is the extra weight of the 25 on the transom for balance when drifting in rough water, an anything else you can think of - I already know Yamaha is the way to go - just want to know how they'll go on my Smokercraft. Thanks in advance