best in-car GPS for adding Maps. if you usually move around. your gps will need download maps easily,usually some overseas maps, so some good automotive gps you will need.

Magellan Maestro 4040

The good: The Magellan Maestro series of in-car GPS devices features an updated and sleeker design and interface with a spacious 4.3-inch touch screen. All models offer useful information on points of interest from the American Automobile Association. In addition, the Maestro 4040 has integrated Bluetooth and text-to-speech functionality, while the Maestro 4050 adds real-time traffic alerts and voice commands.

The bad: During our road tests, the Maestro 4040 was a little slow to recalculate routes. The Bluetooth pairing process was also a bit difficult,and you can’t transfer contacts from your phone to the Maestro 4040.

The bottom line: Sporting a sleeker design and interface, the affordable Magellan Maestro series offers drivers an accurate in-car GPS device with useful trip information, thanks to its partnership with AAA.

garmin zumo 550

The good: The Garmin Zumo 550 provides text- and voice-guided directions to motorcyclists and comes with an easy-to-install mounting kit for a motorcycle or a car. All maps are preloaded on the device, and the unit has a built-in MP3 player and integrated Bluetooth for hands-free calling.

The bad: The Garmin Zumo 550′s points of interest database is outdated and occasionally gave us wrong street names or no street at all for some side streets. Also, automatic route recalculation is a bit on the slow side. The compass only works in off-road mode, and there’s no Mac support yet for Garmin’s MapSource software.

The bottom line: Despite some very slight performance glitches, the Garmin Zumo 550 is a fantastic navigation system for motorcyclists (and cars), with good Bluetooth integration.

Garmin StreetPilot c580

The good: The Garmin StreetPilot c580 now offers MSN Direct services so you can get real-time traffic and weather information as well as local gas prices and movie times. The unit also has text-to-speech functionality, integrated Bluetooth, and multimedia capabilities, and it provides accurate directions.

The bad: The MSN Direct service isn’t available in all areas, and names of gas stations weren’t always provided. The c580′s media player also only supports the MP3 format.

The bottom line: In addition to accurate driving directions, the high-end Garmin StreetPilot c580 provides a number of useful tools to the driver, such as real-time traffic data and local gas prices, thanks to the integration of MSN Direct services.

JVC KD-NX5000

The good: The JVC KD-NX5000 combines a usable, traffic data-equipped navigation system with a plethora of audio and video capabilities in a compact package.

The bad: Its irregular size, complex menus, and rough navigation maps leave something to be desired.

The bottom line: Aside from some usability niggles resulting from its compact size, the JVC KD-NX5000 offers about as many car tech features per square foot as you can get.

Averatec Voya 320

The good: The Averatec Voya 320 sports a more compact and simpler design than its predecessor and is fairly easy to use. It provides accurate voice- and text-based directions as well as automatic route recalculation, multistop trips, and multimedia capabilities.

The bad: The Voya 320 does not support text-to-speech functionality, and the interface on some of the Settings pages can still be confusing. The multimedia implementation also could have been better.

The bottom line: Though the multimedia features are poorly integrated and some interface issues remain, the Averatec Voya 320 is an accurate navigator and an excellent value for those looking for a basic and affordable GPS unit.

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