True, the most basic model is all you need to go out and back to the truck or camp etc.
As mentioned above, it depends upon what you want to spend or do with it.
However, the more you can spend (up to a certain point) the easier it is to use, see, and navigate under a wider variety of situations. My blue Etrex Legend (b+w screen) served me very well for years, and did everything I needed. But I was blown away by the larger and brighter color screen of the 60Cx! I can mount it on the handle bars of the ATV and easily see it while riding.
The smaller legend was a breeze to use one-handed the way the controls were laid out, which made it nicer while hiking - but my current unit's buttons are way easier to operate while mounted on the ATV.
With expandable memory, (some don't have that capability) you can load lot of topo maps etc. into it.
For me, this is the ideal unit for my purposes... there's so much out there, it requires a lot of research to find the right one.