Garmin 64 is what I bought last year to replace a DeLorme PN-40. Also bought the onXmap for my state which has been useful. You can get the 64 for low bucks... upgraded versions of the same unit have additional features but you'll need to determine if those features are worthwhile for your uses. They were not worth it to me.
Before buying, I talked to a local GPS guru that tests different units for BLM/NFS/etc. He said that nothing has come close to the external antenna Garmins. They tested every GPS on the market. Fella was a wealth of info. I believe one of the courses they use is described below...
Link In terms of touch screen GPS units... I've been told the screens become difficult to use in the cold. And I want a dedicated GPS rather than my cell, but that is just me.
Good luck.
Jason
