If you are inclined to buy a CaVeN spa,you could always buy a Phoenix spa and add some aluminum foil to the skirts of the spa.
As Steve said,it's not so much the mid-grade spa that the spa deceptionist sells,but the mannerisms he chooses to use to SELL his product. The owner of that site tries to paint a persona of righteousness,good verses evil etc etc. It's truly amazing that almost all spa manufacturers are evil,and CaVeNs are the saviors of the industry LOL.
He's the last person I would give money to for any purchase,especially off of the internet.
Purchase from a dealer within 50 miles of your residence,so you have the added assurance that if and when a problem arises,you will have a dealer/service tech to help you in a professional and timely fashion.
GL