Thanks for the tips! I actually just got done purchasing my eTrex Vista online 2 days ago and am anxiously awaiting its arrival. I have used my car GPS for about the past year, but first found out about geocaching last week. I did a lot of research and for me the altimeter was important (not for Geocaching, just for my own information). Otherwise I would have most certainly gone with the Venture CX.
I will have to say that I agree with the color screen. The color screen is not necessary, but I would not do without one. It makes it easier to read, and it looks really cool.
Well, as soon as mine arrives, I will be heading out doing some geocaching locally, then on a trip from MN to Washington and back (with a detour through Yellowstone)!