Like buying anything else, I think it would be helpful to state what your goals are for the unit...Do you want paperless caches? Do you Have to have touch screen etc?
I just went thru this..not since I bought my piano did I find such a variety of products to meet ones needs...
For the record...we upgraded from an eTrex and a Nuvi to a handheld Dakota 20 just this week..For us after using the old tech (logging on at night, searching, downloading and printing) it is a god send....
We are a family with kids who live near many trails and want to find a new way to explore them...
If you mean to climb K2, that's another story..