I first put money down on a Coast Radiance with 2 - 7HP pumps. Later I wet tested a Coast Radiance with 3 - 5HP pumps. The noise of the pumps made it so I couldn't hear the stereo. I was looking for a relaxing experience and not a Tim Allen experience. So I looked and wet tested several tubs until I found the Jacuzzi J-470. For $3,000 less than the Radiance I got what I was looking for.
Everyone finds what they like. That is why they make so many diffferent tubs. You can read earlier in this thread my experience with the Coast Radiance decision. I did talk to one spa service tech and he did say what do you think happens after you put large pumps with a great deal of pressure on all those fittings. After a while you have the opportunity for leaks. Another issue I had that you will not was that Coast is a Canadian tub and parts have been an issue in my area. Now Coast is a really WOW tub and I will admit is was an exciting tub but I was just looking for another kind of experience.
Anyway congrats on your new Coast and I know you will enjoy it for years to come.
Scott