The Lazer II is not a bad prop but it is the old Mercury prop. With technology advancements they have designed or came up with a better design and performance capabilities. It is like anything we buy with in just a matter of a few years it is out dated. The difference between Tempest and Trophy is one has three blades while the Trophy sports four. Really to be honest it is personal preference. If your prop performs well for you I would run it unless you want to come out of pocket several hundred. Another option is to send yours to a prop shop and let them worl it for you. They can cut and shave it, balance, cup it,blue print, and do just about anything you want to it that could save money but at the same time it can cost you if you know what I mean. Others will chime in and give you there 2 cents but thats mine. Good LuckRobbie WilmuthTuscaloosa,ALRoll Tide Roll!!!!