wntrun,
Without seeing your setup, I'm guessing you could use either a short or standard shaft kicker.

For me, the primary concerns regarding kickers were weight and hp (pushing power). I have a 2-stroke Yamaha 8 (60lbs) that pushes my 16' boat along at 7mph top speed. Aside from trolling, I consider this engine to be my backup power source - which you may want to factor into your decision.

Last of all - if you can't buy the perfect something for your boat (or its too expensive), you can always custom fabricate something yourself. Like Dogfish, I've make a couple custom components on my boat that work much better than anything I could find in a store.