a member on here has a 196 with an enclosed transom and Armstrong bracket and tower, and recently got a new 4stroke merc 150- seems to be very happy with it. I'm sure he will chime on here and give his opinion.
If you go with the Suzuki- might as well go with the 175 as it is maybe only 15lbs heavier than the 150 (same block I think)... I had an old 2-stroke evinrude 140 (which was really like a 90 at that point)... even that would push my 22-2 around with no problem.