Another viewpoint on heads....
I have a Raritan Crown II head that is at least 10 years old - I've rebuilt it once, it is electric, porcelain, and has a pump motor that looks like it could start a V8 diesel. So I spent a lot once, and can probably keep this forever (or as long as they make $60 seal and pump rotor kits, it's simple to rebuild). Joker valves in all heads need to be changed annually, in my opinion, not fun, but generally not difficult or messy if you clean the lines prior to disconnect. Makes my significant other happy, so it was money well spent. Same old story, pay me now, or pay me later.