You may want to look at an iPad or another style tablet with a tablet holder / mount that can be ceiling mounted. You would then be able to Bluetooth sync back to the head unit to get sound everywhere.

Amazon.com: iBOLT TabDock Bizmount AMPs - Heavy Duty Drill Base Mount for All 7" - 10" Tablets ( iPad , Samsung Tab ) for Cars, Desks, Countertops: Great for Commercial Vehicles, Trucks, Schools, and Businesses : Cell Phones & Accessories
Amazon.com: iBOLT TabDock Bizmount AMPs - Heavy Duty Drill Base Mount for All 7" - 10" Tablets ( iPad , Samsung Tab ) for Cars, Desks, Countertops: Great for Commercial Vehicles, Trucks, Schools, and Businesses : Cell Phones & Accessories
smile.amazon.com