I've used various handhelds with cf gps antennas in the field for soil sampling and mapping. I'm thinking about going to the Trimble units and was wondering which way to go. Always want to go with the most economical, but are there any advantages to the Nomad vs Juno? Also appreciate any other input. I've used Ipaq, Dell Axim (were my favorites but don't make em anymore), Socket Mobile (not dependable).