GGarmin Zumo660 versus Garmin GPSmap 60CSx
 

Hi All.
I've got a Garmin GPSmap 60CSx and I'm thinking about upgrading. The problem is whether one of the newer units, such as the Zumo 660 will provide some of the important functions that I'm going to need when I set off on my trip. These include: an option to follow a route 'off road'. This effectively means following a compass bearing to a selected destination.
Using the mapsource software which enables me to download track logs etc. The ability to enter waypoints, such as fuel points, accommodation etc that others have found.
If the Zumo doesn't do these things is there another model that does?

Thanks,
Geoff