Best Engine size for 33% ?
I think it all boils down to your budget, performance, and what type of flying you are going to do. If I had to do it over again, I would buy a used BME 102 or a ZDZ 80 single. I spent more money on the refurbished BME than a new ZDZ, but I'm happy. If my budget was a little less, I would have gone with the ZDZ and been happy.
The 3W and DA were both too heavy at the time as I wanted to keep my plane light.
Jim!