After 3 years of research this is what I have found. If you are using your boat for a all around ski/family boat and economy is a big deal to you. Stay with the jacuzzi. If you want to haul ass and spray the bottom of bridges. Invest in the kit. Basically a jacuzzi is a high volume/low pressure pump and a berk is a high pressure pump. It really depends on what you plan to do with the boat. I am happy with mine for now, but when it comes rebuild time I will definitely buy the kit. The impellor fab work for my pump is 600 alone (stainless) so it would probably be cheaper for me to buy the kit anyhow. Jacuzzi parts are very very expensive. So if your pump needs a rebuild go for the kit. If it'll make another couple of seasons, hey that's on you.