If this is your first Powerboat, stick with a single engine, I run a 2001 27 Fountain 75mph w/ 500efi. However little cabin room. Narrow it down by price range. All the boats mentioned are nice boats, I suggest going to Miami Boat show and look at all of them. to break 70 you are at least going to need 415hp or more in a 4500 to 5000lbs boat.