I have a 2003 2120 SCDV with a HPDI 200HP. I use the boat for scuba diving 80% of the time, even with 3 divers we'll have up to 10 tanks, weights, gear, etc = heavy load. I went with a 14.75" Diameter X 15" pitch 4 blade. Gets out of the hole great with a load, planes 14-16 knts at...