The Garmin program you are looking at is actually a competent Bluetooth GPS receiver, however Garmin has updated it with the GPS 10x. This is a much better, less expensive unit but does not have a magnetic mount. Each comes with the latest Garmin map and nRoute software.
For the price, S&T 2009 with GPS or Garmin Mobile PC with GPS 20x are a better buy and each is more suitable for laptop use. The 10 series is aimed more at the PDA market. Also your laptop would have to be equipped with Bluetooth.
Terry