Interspersed comments below.....
Q1 -- Why should I buy the color system over the B&W?
Brighter, easier to read screen, in all light conditions, with a
wider angle of viewing...pilot can read it on co-pilots yoke..
Q2 -- Can either the 1000 or 2000c be loaded with the land database and used
to navigate on the ground?
Yes, it is included, unless you want the Canadian data, it's extra..

Q3 -- Anybody ever time out a set of fresh alkaline batteries?
Yup!
How long did they last?
3 hrs for colour, 4 hrs B&W
Same question(s) for NiMH, please
dono, never used them
Q4 -- Any druthers on a different brand?
Once you get out of the "Garmin, Garmin, Garmin' mind set, the 2000
wins hands down, IMHO
We had the B&W for a year, got the colour 5 mos ago.
On a Warrior's yoke, we have yet to plug in the remote antenna.
Waiting for the terrain 1GB card, (end of Jan), and will be loading
the Canadian database then as well. Lowrance support in Canada has
been the very best.. Unit is easy to learn and use.
We like it very much, has exceeded our expectations....
And NO FREAKING MAGNETS in the antenna with instructions to mount it
on the cowl!! (beside the compass) !!
WHAT was Garmin thinking??
Glad we made the choice we did..
YMMV
Cheers!
Dave
Go Fly!
Casey