rooCASE Neoprene Sleeve Carrying Case for Garmin nuvi 1450 5.0-inch
The GPS goes in the console or the glove compartment when not in use - along with the tire gauge, the Leatherman multi tool and other sharp objects that can scratch up the GPS screen.  This neoprene case serves very well to protect the GPS unit.  I have had it for two years and the GPS screen is totally unscathed.