My current prop is a 19 pitch cupped aluminum prop. I get 6050 rpms and 51 mph at full throttle with optimum trim. My rpm limit is 5750 (1990 Evenrude 175). My boat is an 18'6" Glastron bowrider that I use for skiing and cruising. I would like to find a prop that will keep me in my rpm range, maintain my excellent hole shot, and maybe give me a few more mph. I'm thinking that I want a 21 pitch stainless steel three bladed prop, but there are so many different brands and styles to try. I would appreciate recommendations from those who have had good or bad experiences when shopping for props.