I have had a large 2 stroke and certainly would not go back to it. The power delivery of the Verado is very smooth and very quiet. If the boat is for family days out you WILL want a QUIET reliable engine.
I know commerical operators that had Yamaha's went to Suzuki on price and very quickly back to Yamaha because of ease of maintenance and reliability.
I run my Yamaha's to 3000 hours then change them and put more of the same on the boat.
Or change the boat aswell if that is tired.