Sterba
I run a Sterba on my -4 , I bought it for less than $300, refinished it and balanced (static). Smooth, durable and very easy to maintain. Im running a 160 hp O320, and get about 162 kts true at 2600 RPM. Ideally, Im a bit underpitched, and will likey try and get another Sterba in the future. Im a budget guy, and my wallet has too many leaks to spend a lot on a prop. The Sterba has a urethan L/E that will deflect much abuse.