"Yes, in determining the type of boat, speed is the first question to be answered. Coming from a sailboat as I did you're probably thinking slow trawler 6-8 kts speeds. Once you get a taste of 18+ knots it's hard to go back."
So once again the question becomes is the voyage or the destination the goal.
As a long time sailor and displacement power boat sailor , and now with a couple of seasons with a 20K cruiser ,
My choice is for a great voyage , with the ability to anchor independiantly for a week or more is far more important than racing to a marina power pole.
Your boat use DESIREMENTS are key to your boat choice.