don't know what brand you are looking at, but i would go with a 5,000 or above lift. is it a track or a sling? fresh or salt water? you didn't tell us much.
fresh water. why so heavy for 3,400 lbs. boat. I don't know what track or sling means but that is info I'm looking for I want to have a little knowledge before I go to any stores and have a salesman talk me in to anything. I want to go into the store knowing what I want.