I had a three blade OJ prop that came stock with my boat. When I started running more weight it had a hard time getting up on plane. I called ACME and described my boat and weight set-up and they recommended one of their four blade props (sorry I don't remember the model number). I switched out the two props and my boat now planes out better than ever and can handle even more weight than before. I only lost about 3 MPH off my top end as well.
Thor, thats funny because thats what I did with Acme too and they recommended the 653 to me. I wanted to stay with a 3 blade because I've heard they are better for a clean surf wake. whether or not thats true I dont know but the prop is great and I still have a super clean surf wake.