Off road suggestions?

Basically, I’m looking for a GPS for off-road bike touring, with the most important features being following routes (“courses”?) that I’ve defined, recording traces to share with the world, and displaying maps from a variety of sources (not just Map$ource).

The Vista HCX seems like an obvious choice, but:
1) It’s really old. Is there anything newer?
2) It seems to have some limitations. Only [url=http://www.cell-phone-accessories.com/garmin-etrex-vista-hcx.html]50 waypoints per route[/url]? I want to create/download really finegrained routes (not following actual streets, just straight lines from point to point) that would consist of hundreds, maybe thousands of points.
3) Are there any non-Garmin alternatives? I’m not coming across much?
4) A more generic, touch-screen device might be fun…if it’s rugged enough and has long enough battery life. I want to be able to record a 3 day trace.

Any suggestions? Even the names of candidates to research would be a great help.