You ought to just find you a used XB2002 or XTB-21 and hang brand new power on it. Save you money and still have a boat, thats built better, rides better, WAY more effecient (getting DOUBLE the gas mileage) and of course will perform better with small power than ALL that you and everyone else has listed. Sorry for the hurt toes folks. :D I know of a 1988 XTB-21 Allison for sale right now for $6500 (maybe less). It needs a little TLC in some spots on the Gel, but over-all its in good shape for an 88. Just a dated Trolling motor, (has an old 150 MErc Carb Motor) needs new electronics and you have a 21' basser (19'11" centerline) 86" beam full-featured basser that can seat up to 4. A PERFECT motor for this rig is a new Yamaha Vmax 150 or 175 HPDI. This boat will tow easier as well because its a lot lighter than anything you listed. It needs a loving touch but would be a perfect "canvas" to give a new lease on life. New motor, New TM, New Electronics, and STILL come in for less $$$ than a brand new rig.
