>>16825260CSx.
Upgraded to a 78, turns out they're shit. Wouldn't load maps, way too many keypresses to do basic shit, font/screen is difficult to read... some things were faster (drawing the map), other things were a lot slower (finding POI's on the map), and there's a lot of features they took out of it from the 60/76 line.
Bought a 76Cx instead. Better all-around for what I use it for. Better mount too.