If I were you, I would go ahead with your initial purchase decision as you seem to have already made it... by leaving a deposit.
In this community, as well as the rest of the internet, you'll here so much commotion about this subject that you'll end up more confused than ever before by asking such a question.
Buy what you like...
btw, I think that chart you made has little relevance on buying anything as it's designed around numbers. You should LIKE what you're going to buy. When you're in the tub that chart will be meaningless.
And if you don't like the Jacuzzi you put a deposit down on, then don't buy it.
Just don't hose the dealer over in the process that's holding your deposit as that is a commitment to buy. I think it should be honored, especially since it sounds like a pretty `hot` tub!
I think you'll be happy with your purchase.
Best of luck.
(No, I do not sell spas - but without the dealers that put them there in the first place I wouldn't have a job either

)