Buying and selling props till you get the right one could take you and lot of money and a long time , probably both. Take what you have and tune it for your boat. You can drop down to a 25 for the hotter months , but it comes to the same thing . All props out the box need some kind of tuning. A boater should take his prop and tune it for his setup , his weight he normally carries, where he fishes and many other things. Your fury 4 will be your better selection on the four blades , but it comes to the same thing , buy it , run it get some numbers off of your test and have it tuned for your application.