Don't really know salt water and big fishing boats that well.
My father has had the same boat for 6 years now. Formula 400 Super Sport. Full size 40' Cabin cruiser with Mercury 525s and can easily top 60MPH. People are always surprised to see a boat that large passing them. Handles like a 20 footer but handles rough water (as rough as a lake can be) really well. Turns on a dime at high speed too.