$1.7k for topography display. I'd be curious about how the addition
of a color display affects battery life.

If you have it plugged into the a/c power source it wouldn't matter.
I have the marine version of this unit and it does consume quite a bit of
power when you back-light it.
What I don't understand is why it took Garmin a whole two years to put the
color version on the market when their marine counterpart has been out there
for that amount of time.
Were they waiting for everyone that was going to buy the black and white
version to do so? Then they would introduce the color version and get some
of the same buyers to upgrade.
I guess it makes business sense.

David (KORL)