when I had a 3.0, I had 3 props with me. a 19p for WOT runs, a 17p for most things and a 15p for watersports
as Jimmbo stated, your boat is a bit much for a 5.0
your 3400# dry weight will be closer to 4200 once you add batteries, gear, fuel, etc.
I would shoot for a 17p myself if you...