We used the bean bag style {portable mount} for the 60cs and was really amazed how well it worked on dash. When we stopped for supper we just grabbed it off the dash and set it on the floor to hide it.
If it does not come with a PC interface cable. You will need one to transfer the waypoints to your gps. However, being a new model, it should be included. The only other thing you may consider is a cigarette adaptor to keep your batteries fresh.