Hey, glad to hear from another Tucsonan! @Scruffynerf and @jeff are probably more up on which rings are best than I am. They’ve come up with some really interesting stuff from aliexpress, which I haven’t dared try yet.
I stick mostly to Amazon - mostly BTF-Lighting and Alitove, and the things that @Wizard sells on Tindie. Got to say though, for circular layouts, I think these are super attractive.