I disagree.. Color is nice, but the truth of the matter is color units
have crappy battery life. If you really want a unit that is a good
emergency backup unit I think the Airmap 500 or 1000 are good
alternatives.

I've got the AvMap IIIc, and the Airmap 2000c. Only the Airmap has internal
batteries at all, and they will only last a few hours (maybe 3?) when on
internal power.

Of course, that's more than plenty of time to get down, if you really need
to.
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"