My wife and I can not agree on one shower head.
I would like to install 2 heads on one control. I need to be able to select my head and the one for my wife's easily. I am not interested in using both at the same time.
Got any ideas.
Thanks for any help.

You need a diverter valve. Most shower valve manufacturers make these that go on the shower riser between the valve and the shower head. If you can't get behind the wall some companies make a small one that can go on the outside of the wall with a lever that switches from one to the other. Symmons and Alsons would be your best bet to find.