I'd go with one that has more filter like the hot springs. My old tub was a dimension one it had one filter. My new tub is a hot springs with three. I have never had trouble with water quality in the hot springs tub.
I have one setting where there is no bubbles and it's the only one I use. Sure would be cool if I could have all jets just push water. I have the comfort control turned all the way down.
http://fayar.craigslist.org/for/4647272376.html
One owner
The person selling it was the original owners lawn guy he gave it to him. He has tested it and put new seals and impeller in.