You are looking at all very reputable and well made hot tubs. Choose the one, that fits best for you, don't buy a hot tub without wet testing it. Try and wet test it multiple times, I know that sounds crazy, but a good dealer will not mind that request. Dealer is key here, go with a dealer who is there for the long run. It is a considerable investment and you want your seller to be knowledgeable, dependable and trustworthy. One thing not to forget about, is you can write these tubs off as a tax write off. I have arthritis in my hip, I had my doctor write up a note and prescription for me and I gave this to my CPA for the current tax year. Just a nice added benefit to purchasing one. Good luck with your decision, it is some maintenance, but well worth it. If your meticulous about maintaining items you purchase, you should have a good 15 to 20 year run on higher end tub.