We almost bought a sunbelt spa. they can be customized by the dealer. the dealer buys the shell and add the components. wet test one and then compare it with a mainstream brand, there is a big difference especially in the warranty. the warranty was 1 year @100% and then 50% for the next 4 years. We bougt a hotsprings-vanguard and love it. 5 years @100%. Go to their website: sunbelt.com
Good luck