[Canuck]

I have used Laptop GPS by Delorme and Microsofrt Streets and Maps. I have found laptop systems too awkward whaile driving.Also had three Magellans,with the current one being the Roadmate 760. Used it in Italy last year and it was great. Its mapping coverage and detail is fantastic. My wife hate listening to the voice commands,as it is the only female voice i will listen to for driving instructions.
I have a factory Nav system in my new Mercedes and the info is not nearly as complete as Magellan and the POI's are outdated (shows two gas stations near my house that have been closed for 5 and 10 years respectively). Most mapping software is written by Navteq,they are constantly developing expanded routes and new detail. I would recommend Maggellan every time.