Looking at a Jacuzzi 335 and Artesian Island series Antigua spas. There seems to be exclusions in the warranties on all the important component stuff. Is anything really covered “under warranty”? I’ve been trying to understand if one warranty is better than the other, as we like both spas. Artesian dealer has offered an upgrade from 3 to 5 years on the components for $300, but exclusions are still there so not sure it’s worth it. Also is the water purification systems better on one over the other? Any input please…Thanks Ready to take the plunge!!