I have decided to go with the Wallee case http://www.studioproper.com/collections/ipad-wall-mount
after seeing it and the mounting systems at https://captureintegration.com/
and have pre-ordered the Wallee Pro Bumper http://www.studioproper.com/products/ipad-3rd-4th-gen-pro-bumper
to go around the Walle for protection against most drops. One reason I decided to go with the Wallee was the Wallee Connect made by Tethertools http://www.shop.tethertools.com/Connect-WCONX.htm
Edit:Tethertools has a lot of other wallee mounting tools as well: http://www.tethertools.com/plugging-in/wallee-ipad-modular-case/
The Wallee Connect is my first purchase from Tethertools and fortunately Capture Integration here in Atlanta had one in stock.