Magellan is an excellent brand of GPS for the prices offered. Especially if this is your first purchase of a GPS system. It works very well for avoiding traffic.
I think Magellan GPS units needs the least updating
The Magellan GPS mounts costs in the range anywhere from $100-500 depending upon what model your purchase and how many features it has.
Magellan offers a variety of different components for their GPS navigation systems. You can purchase adapters, mounts and cases. The following is a link to Magellan website where you purchase accessories, http://www.magellangps.com/Products/Accessories
Best Buy, Target, Wal-Mart, Radio Shack, and i think that's all.
The Magellan Triton 300 Handheld GPS has many great features and you can buy one at The GPS Store online.
The best kinds are probably magellan and garmin gps units. They have many features and you can find good reviews on them at either cnet.com or pcmag.com which also talk about each feature on the best GPS. You can purchase them at any major retailer that sells electronics.
Magellan makes many different models of GPS. If you visit sites like consumerreports.com or retrevo.com you will be able to compare the different features and benefits of each model.
To mount a Magellan GPS you have to simply place the cup onto the window and press down firmly. This will allow the air in it to escape and suction onto the window. It is very simple to do.
Online you can find intructions for the Magellan GPS by visiting the following webpage where you will find Magellan GPS located just under the "G" heading. http://www.retrevo.com/samples/Magellan-GPS-manuals.html
There are many ways that one could mount a GPS unit to a dashboard. The best way to mount a GPS unit to a dashboard would be to purchase a good GPS mount.
The best of the two, Magellan and Garmin, would be Magellan. Magellan has the most accurate and consistent GPS. Shoot for Magellan for sure, you will definitely never have trouble with it.