Get a TomTom Go 500/700

Fantanstic, purpose built and well designed GPS device with a touchscreen. It comes with a wireless (ie. not line of sight) remote control and also works as a bluetooth handsfree car kit. It can also be wired into your stereo (to mute, and for instructions) with an optional cable. You can also use it while walking or riding a bike.

www.tomtom.com

We have 2 cars - a BMW 318i E46 with Mk-IV Navigation and a smart fortwo with a TomTom Go 500.

The TomTom wins hands down for functionality IMO. Very clever and easy to use.
The only benefits of the BMW Navigation are:
- looks neater being integrated
- navigation computer has a gyro and wheel speed sensor inputs (therefore can navigate underground/tunnels/in dense cities

Have fun.

Paul Martin
Australia