I just got the 60c, I have been using the 76s for the past year. The 76s has a larger screen, rock solid for caching. It has a compass and altimiter but I really have not used them. The compass really cuts battery life and I always carry a regular compass anyway. I've had the 60c for a week now. It locks onto 6 sats in my living room with an EPE of 12'. Loading topo maps is very quick with the USB interface. I can load all of Connecticut, Mass., and RI in memory. The screen is small and you don't get much topo detail. If mapping is what your after, the 76s has a bigger screen.