Bob Cole on his worst day is better then Simpson, Hughson and Healy on their best.. I don't need Cole to tell me what's going on in the game, I'll use my eyes for that. His voice IS HNIC.... An absolute legend.
The unit doesn't matter, the map does.. If you had a garmin GPS loaded with a topo map for example, you'd get all the land elevations and the outlines of the lakes..