gps

Garmins are full of best navigation features.
Prices are best at Amazon
I have been using this Garmins for a few years , and have found that I don't even have to update as much as they say, because the maps are very complete.

The only problem with these are the price is a little high, but if you shop at the right store you can defeat that, and looking for deals will also save you. I have had a few complains about people who will buy the used ones, they never seem to add up to expectation, so shop wisely.