Actually all I seem to see anymore are 4 strokes. There is talk about many lakes forbidding 2 strokes and I believe some have already.
I owned a 4 Stroke Yami and now a 4 stroke Merc, but my needs may be a little different. I purchased my motors for assured safety should I have a break down as well as a trolling motor. In my case I spent the extra money on the brand name. I didn't want to put life on the line with a motor I never hear anything about, Good or bad.
This is the only purchase I've made in a long time where I actually cared what the brand was.