I am torn between the Hot Springs and the Caldera spas. I like the Hot Spring Vista features (controls seem more intuitive, like the Ace system), but the Caldera Geneva and Cantabria are great spas also with better pricing and a dealer that is known for excellent service, which is extremely important. We are still debating and trying to figure out whether to place spa on EZ pad, concrete pad, or cinderblocks. With either option, we would plan on adding a paver path from deck, keeping a 2-ft clearance on all sides of the spa. Any comments on the foundation for the spa or any of these models?