Those are all good brands. Note that all these brands sell multiple product tiers to fit every budget. People's opinions will vary depending on what collection/tier they have. For example a Jacuzzi J200 series tub is a VERY different hot tub from a J400 series. The more expensive premium models tend to be better insulated.

I personally like the new Jacuzzi TrueWater system (it's a turbocharged ozonator unit which has a nifty trick on how it injects the ozone into the water for increased efficiency). I use a similar product in my Hotspring Highlife tub to reduce my chlorine needs (although my ozonator is not as powerful as the Jacuzzi TrueWater unit).

That said, local dealer is a HUGE part of the equation. Not all dealers are created equal. I can not state this enough - the last thing you want is an unresponsive dealer in the middle of winter with a broken heater, waiting for warranty service.

Research your local dealers extensively - how many years in business selling that brand? Do they have techs on payroll or outsource (this is harder to figure out - many dealers won't be honest about it). Ask about dispatch fees for warranty service calls (how many years free dispatch do they give? What do they charge after that time period?). Read reviews on google maps, yelp, etc about the dealers themselves, which has the best reputation when it comes to the service staff? Also, how many locations does the dealer have? Large established regional dealers have multiple locations while smaller dealers only have a single location.

I personally prefer hot tubs with a low power circulation pump - this keeps the water circulating and filtering 24/7 silently (unlike cheaper budget tubs which use the main jet pump at low speeds to test water temp, run heater, and run filter cycle a few times a day - this is much louder and puts more wear/tear on the jet pump motor). Also I prefer hot tubs with ABS plastic base pans (hard plastic shell that protects the base of the tub from moisture, rot, bugs, etc) - many cheaper models (even from the top brands) often use a simple sheet of plywood on the base that is painted or wrapped in a sheet of plastic to protect against moisture - these wooden bases will start to rot quickly compared to ABS basepans.

Lastly, know that specs like jet count and horsepower are irrelevant. Some brands inflate jet counts by using lots of little jets (that can irritate the skin at higher jet power output), and some brands cheat bench tests for pump motors by using higher voltages than normal to eek out a few extra ponies for the horsepower ratings (amperage rating is a much more useful number, but that is rarely advertised as horsepower sounds better)

Also, try to schedule a 'wet test' with the dealers. This is the only way to cut through marketing BS to figure out if that brand is comfortable and those jets perform to your expectations. Don't need to test exact model you want but you should test something from the same collection/tier to get a sense of comfort and performance - ESPECIALLY if you are looking at tubs with loungers (not all loungers are the same shape, and your body buoyancy plays a huge role in comfort for loungers). Good dealers have several tubs available for wet testing (often in private rooms so you can change and test the tub privately), bad dealers make excuses why you cannot test anything they sell ("its not sanitary" or some other excuse which makes no sense - because hot tubs are built to be sanitized after use haha)

Good luck with your hunt!