where do you suggest to buy a cheap but good GPS unit?

GPS systems are great! Esspecually if you are someone who travels a lot! Some of the best GPS systems are Garmin, Tom Tom, and Magellan.

With a total weight of 5.1 ounces and slim measurements of 3.87 x 2.91 x 0.87 inches (WxHxD), the nüvi 350 is just right for the pocket or purse. A bright, 64,000-color display dominates the front of the device and a resolution of 320 x 240 pixels means that there's plenty of room for displaying map data and other elements of the device's interface. With the Tom Tom Navigator 6 Software with Maps of the US and Canada (DVD) and Bluetooth GPS Receiver you never need to be lost again, wherever you are, whatever you are doing. Tom Tom's Navigator 6 software is designed for people who already own a PDA that supports Bluetooth, and don't want to buy a separate Tom Tom navigator and GPS unit. The Magellan eXplorist 400 makes it possible for the modern outdoorsman to enjoy life in the wild while, still benefitting from cutting-edge technology. Its pocket-sized and lightweight frame was built to perform on the most challenging and rigorous adventures.