I've spent a lot of time trying different props. I'd be curious to know what other people have for a boat and motor(s) along with what prop you run? My favorite for a 17.6 with a 150 E-Tec is the no longer available the stainless steel 3 blade 15 by 16. On the 20' Open Bows with big block Evinrude E-Tec motors we tend to put 4 blade 17 pitch stainless props on. For two motored ski team boats we like 3 blade props with the 17 stainless again usually getting the nod.