Nordic makes a good quality, basic entry level hot tub. I can’t comment on price, but based on past experience and company reputation, they would be near the top of my list for a somewhat entry level hot tub.
Issue FINALLY RESOLVED! Replaced the heater today and that seems to have been one of my many culprits. Hot tub is now heating up. So I assume whatever zapped the battery on my board also took out the heater in the process. After installing that battery…cleaning out the ozone line clog…and replacing the heater- I finally have a functional hot tub. Thank you CanadianSpaTech and everyone else for your help !