Rono,
I've had a GPSMap60CSx for a few years, mainly for bushwalking and hunting. It's a great unit. For the car, using City Navigator, it is small and it doesn't have voice prompt, but it does the job. A little bit of time needs to put into setting it up for when you want overview or zoom in to work automatically. I've loaded it up with City Navigator, OZ Topo, Tracks 4 Australia, Speed Cameras etc and BlueChart Pacific (yes boating too) In other words every topo map (20m and in some locations 10m contour interval) of Australia, all the roads and nearly every 4WD track in Australia plus all the marine charts from Tasmania to PNG and east to New Zealand, and I've still got room for all my tracks, waypoints etc with room to spare.
It's small, compact, lightweight, colour screen and can run off every day batteries, rechargable, aux power, and if you want to jump out of a perfectly good aircraft it has a "jump profile" with altimeter and best chute release. Yep, I like my Garmin GPSMap 60SCx.
R2