I spent the last several months looking for the same kind of boat you described. Ten days ago ago I ordered a 19' Competitor by Northwest Jet Boats. I couldn't find anything that I thought compared as well for the money. Also, they are great people to work with, very professional, and very helpful. In my research I talked to eight people that either owned one of their boats, or had their boat worked on at N.W., and every single one had only very positive experiences with them.
Also the Competitor with the optional 351 Redline (Ford) has all the thrust/power you could ever want.