I personally use the Lifeproof case and belt mount (modified to attach to the left fairing).
The case is waterproof, shockproof and dustproof and guaranteed to a depth of 10 meters. It is actually designed for extreme outdoor activities.
Using the screen is not a problem however I have deliberately mounted it where I can't use in on the move although it is attached to the starcom via Bluetooth.
So if the ST goes in the drink I can call for help at the bottom of the river.
A.