I can't tell you which to buy - only give some advice on hot tubs.

My wife loves hot water, so we've had a few hot tubs and I learned about them and how to maintain them because it makes her happy.

Several years ago we claimed a free, non-working SofTub (largest size) on Craigslist. It was an easy fix - the internal GFCI had to be replaced - and we used it for a few years. These heat water via convection by running the water around the hot pump, run on 120V, and are really easy to move around when empty. Liked it so much we upgraded to a new, medium sized SofTub and used it for 5 years.

This year we upgraded to a "regular" type hot tub on 240V. Benefits are the heater is separate, so they can be used longer in the cold without losing temp, they have stronger jets, and they keep water cleaner longer with less chemicals. Ours has a UV bulb and more mechanical filters. Newer ones can be self contained, sealed better, and may use less wood than older models. You can just plop them on a deck, rather than building them in.

The key is to have it in a place that you like and is easily accessible, like ralphwiggum above. Ours is also right outside our master bath.
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Good starting lists. Hot Spring and Jacuzzi are probably the top two, but also the most expensive.

In the "more info than you may want department...

If going with a new upper end hot tub, you may want to try a "wet test" at a dealer. They usually have a model kept heated and a changing room, and you try the tub in the store. Weird experience, but this helped a lot for us in our search for a small 3-4 person tub. On the Hot Springs, we did not like the "Moto-Massage" and the seats were too deep for my wife. Jacuzzi had better control over which jets were on and off - I like jets, my wife likes to soak.

I kind of thought that too, but I've also learned some interesting info at times on non-pin related subjects on Pinside. A smaller sample size, but the people willing to offer something outside the pinball subject are sometimes quite helpful (I recall seeing several @vid1900 posts on off-topic subjects).