I have just purchased a Delorme GPS reciever and software package.
Came with streets 2006. I also purchased a Delorme Topo version 5 software package. These can run at the same time gathering gps info from the same gps unit. For a mount I will be using the RAM mount sytem.(http://www.ram-mount.com/)
heavy duty and vibraton absorbing. They also offer cellphone and other specialty mounts that tie in the the laptop mount system. Topo 5 software show a 3D view of terrain and can be integrated with sattelite quad views in a second window pane. Really neat.