I have a high-end, two-pump-plus-air-pump Evolution from Costco and have been more than happy. I had a pump replaced under warranty and the service was flawless. I had to call the manufacturer instead of Costco but I couldn't tell the mileage difference over the phone. :-)
Ii would do it again.
BTW, i accidentally found some spa delivery guys at my local pool supply store and they uncrated and set the spa in place for $50. The initial delivery driver and his helper moved the spa from the end of my 50 foot driveway onto the patio for a $50 tip.
The licensed electrician I found pulled a new 100 foot circuit (6 gauge copper stranded), including main panel breaker and new GFCI breaker box, for $700.