Dear Howie: Your choice is a total no-brainer. The AquaStar's warranty is only the icing on the cake. It will keep on producing hot water long after the tank has gone to iron oxide heaven. One of my customers is replacing a 2" diaphragm in his two AQ125s, after 12yrs of use. That's 6 yrs after tank warrantees' expire. Let me know what your needs are, & we can you send the AquaStar to fill them. We also have whole-house tankless electric units. Call Brian at 800 851 9891, or e-mail me at email@example.com Selling water heaters is a Tankless job. Regards, Brian.