After looking at my options for larger configurations, I've decided that Iro looks pretty good after all. So, I'm sipping the Cool Aid now, and it tastes pretty good If the ET works as well as advertised, it should be great.. It looks like I can work around things via the start times or daily intervals.
In Southern California, homes with >1 acre are given rebates of $35 per zone, maximum 100 zones. So, a 16 zone controller earns a $565 rebate, (but only up to the purchase price or installation cost). A little math shows this to be a really sweet arrangement for larger residential applications.
I like having an open API, IFTT, history data, and other device integration. I'd love to get something on my Pebble watch (at $80, waterproof to 30m, and with big buttons, it's a little more practical to wear while mucking around the water and the mud around the sprinklers than an expensive).
So, here's hoping...