Strip, not sure why you want a four stroke. Do you have a particular reason in mind or just a case of four stroke fever??

If you have a good reason to want one, or lot's of extra money to spend -- then so far I am hearin good things about the new yammi 4 stroke 150.

On the other hand, if you are minding your budget or just want the best bang for your boating buck --
I believe that for the way you use your boat -- 10 to 15 mile round trips fishin Long Island Sound from a Connecticutt homeport -- you would be better served with a new 150 carbed 2 stroke, because you are not likely to put the hours/miles on a 4 stroke to recover the higher price with fuel savings. The money saved could be put to better use on a kicker or quality electronics (gps,ff,vhf or radar) or a nice tandem trailer for Cape Cod excursions to harass Macojoe. ;D