Personally, I know of two satisfied Vita owners. There is a lot to be said for a local dealer. How comfortable are you with them?
Here where I live, is a well respected dealer who carries Hot Springs, Artesian, and Cal Spas. Cal doesn't have a great reputation (at least on the internet), but a friend of mine bought a low end Cal tub for about $2500 from them 4 years ago. They fully new all the details of the 2 year warranty. They just had their first major problem with it, the dealer regcognized the symptom over the phone and gave them the option of a non-warranty sales call, or they could come in and buy the part for a reasonable fee ($75) My handy friend took advantage of that and had the spa back up again quickly.