what is the best GPS navigator to buy?
It depends on your budget. The Tom-Tom units are cheap, but then you get what you pay for.
Here's a good look at some:
David Pogue has some good real-life stories of using GPS's
The best GPS system depends on what your needs are. One of the best GPS manufactures in the USA is Garmin. But thre are many different models of Garmin GPS systems. You can get a bit more information on the subject here:
The website Tanga has daily specials....todays: GPS...Hurry !