I also had a laptop system and as you know when windows messes up you have to reboot, try doing that going down the road, not fun. So I bought a Garmin C340 and that was the best investment I ever made
. You have to make sure the unit you are looking has the antenna built in, some require you to hook up an outside one. The main difference between your's and mine is blue tooth for you phone. Let me know if you have any other questions.