I wouldn’t hesitate to buy the Competitor tiller.
My boat is a ’94 competitor 170 Tiller with a 60 h.p.4S Yamaha. It is 16’4″ long, so it is similar to your future boat, however mine has a max h.p.rating of 60.
I fish a lot of the big lakes in Minnesota like Mille Lacs, Leech, and Winnie and it handles all of those very well.
As far a trolling, mine with troll down to about 2 mph depending on conditions.
Love my boat.
Ron.