Thanks for the responses. I like that Ecosmart brand one that @
jsimon7777 found there. The Ecosmart ECO 18 looks like it would be OK in my current climate zone doing up to 3.2 gpm but,
in two zones up and most likely where this might end up it gets 2.6gpm. That still looks good and it has a lifetime warranty which is even better than the two I originally looked into. If it was staying
in FL then I'd probably drop to the EcoSmart ECO 11 but I want to be safe rather than sorry. At two zones up the ECO 11 only is putting out 1.9 gpm while a regular shower head uses 2.1.
I'd have to use a low flow on there to bring it back to 1.5pgm but even then, if that low flow shower is being used and somebody uses a faucet, it's struggling. So, ECO 18 it is. Thanks to all the Marios and Luigis!