Although using a laptop for routing could prevent the purchase of a GPS unit, I would suggest the purchase of the Garmin 2620. About $1,100.00. Yes, it is a healthy price to pay for routing "software", but consider that your laptop is not made to be used in a truck, sitting on a stand, the floor or the passengers seat, while driving down the road. Neither the integral components, nor the external components, i.e. the hinges, disk drive, etc. will hold up to the abuse of a truck on the road, for extended periods of time, unless you have an extremely smooth riding truck. Still laptops are not designed with this purpose in mind. I don't know about computer software for routing, but the Garmin 2620 with voice activated routing, will tell you where to turn, when to turn, and if you $%^&ed up. I mean missed your turn. Then, if the latter, will immediately re-route you to get you back on track, as if you meant to arrive at the consingnee, for instance, from the north instead of the south. It also has truck routing, toll avoidance, dirt road avoidance...etc...etc....
The Garmin also has search features for the immediate area, the route area, or any area that you can think of within the U.S. and Canada. There are way too many features to list here!!!!!
For those of you considering the purchase of a GPS, I would strongly suggest spending the extra money and buying the best unit available to you.
I had originally purchased the monetary equivellent unit from Magellan, but after not finding a street or two, and being excessively routed to my destination, I decided to give the Garmin unit a try, and boy am I glad I did.
The time and money saved on fuel, not to mention lower blood pressure, because I am the man who knows where I am, and where I am going(even ask my wife, she'll tell ya) in about 2 months in shorter routing and not "looking" for the pick up and delivery locations, not to mention a Wal-Mart, or a place to fuel, or having wrong directions from dispatch (like that ever happens)
, I would say that It will pay for itself in a year or less.
Just my opinion, take it for what you will.
"I'm not much, but I'm all they have".........Kempers_gramp