What is the best propeller for my boat?

i have a 1986 sea ray mercrusier with a 350 big block in it(im not sure what it is in boat terms) i need to get a new propellor for it but not sure i only use it for skiing and tubing with my friends so i want a good one to get the skier out of the water with no problem. my boat has trouble on getting up to speed but my prop now has a not of dings and damage to it.