Years ago I had a Garmin unit. I can't remember the model number. StreetPilot 26XX,27XX or 28XX. What I liked about it, was that I could input a percentage of types of roads that I wanted to travel on to my destination. I remember entering 10% highways and 90% small roads (or something like that) as an example. I would like to keep 2 units on my bike. My Zumo 660 and one of these older ones that do a better job of keeping me on rural roads. I recently did a 2700 mile trip with no Interstates. Even though I have shortest distance set as a navigation option on the 660, I would like to have been off more highways. Does anyone have an idea on the model(s) I'm talking about?