My wife got me a Garmin GPS V for Christmas - $300 from Target. Works as a handheld and comes with automotive mount, power cord, and software. Does turn by turn navigation that my e-Map did not.
The only downside I've found is that the non-color screen can be hard to read with sunglasses on. Also, the memory is not expandable, so you if you're travelling you'll have to load the city where you're going for the details. I was able to load the high detail maps for all of Arizona. The basemap includes all major highways in the US.
http://www.garmin.com/products/gps5/