Sounds like you had a good time with the Zumo. How was the sound quality with the Scala FM (listen to any music)? I want to use a Zumo for a trip from DC to Yellowstone this summer.I have the Zumo 550 and love it! I used the software on the computer to plan out a trip through CA, NV and UT. We wanted to stay off the super slabs as much as possible. That made planning the trip a little more difficult as the program wants to compute what roads you take to get to each waypoint. We ended up putting a whole bunch of waypoints on little state roads to keep us off the interstates. We then exported it into Google Earth so we could see our route on a satellite image. That helped us catch a couple dirt roads we decided to change. Once we were happy with it, we downloaded it to the Zumo and off we went. All in all, it worked out very well. We'll use it in the cage as well. The car mount has a built in speaker so you can hear directions. On the motorcycle, I use the Scala FM bluetooth headset.
I too tried for days. When they come out with a model that intergrates with google maps then that is what I will get. For now mine can go 10+ hours on battery and I can trip my route the way I want to go.Confused... I tried to do this for like two weeks with google maps, and my Nuvi 750. I was never able to get it to work correctly. It will import you stops/location as waypoint, but will normally find the fastest route, and not your more scenic route. It is too bad because google maps is so easy to use with the dragging of the routes. If you have a Garmin device you can do it in the Mapsource software pretty easily, but still not as easy as Google maps.
P.S I have the Nuvi 750 for both the car for the wife, and with 5 hour battery and ac/charger I can use it on bike trips as well. Nice little unit.
* If you are getting a GPS mainly for motorcycle make sure it allows you to do routing. Several of the entry level units not made for motorcycles do not have this feature. Routing allows you to setup your own custom scenic route, instead of the normal fastest from A to B on Freeways that the GPS will try to do.