HP iPaq rx5900 Companion
Pros: PDA functionality, comes with car dock and charger, built-in WiFi and Bluetooth to round out connectivity options.

Cons: Battery lasts only 90 minutes.
$599.99

www.officedepot.com

Pioneer Avic-N3
Pros: Best in-dash navigation, searches telephone numbers, gives turn-by-turn directions while playing a DVD, large 6.5” screen.

Cons: Costly installation.
$1,800.00

www.pioneerelectronics.com

Magellan Maestro 4040
Pros: Bird’s eye, 3-D view, automatically recalculates if you miss a turn, optimized database of gas stations, restaurants and ATMs, large icons.

Cons: Removes map from screen while recalculating a missed turn.
$329.99

www.circuitcity.com

Tom Tom GO 720
Pros: Sleek and offers up-to-date maps and safety info, text-to-speech functionality, integrated Bluetooth and multimedia capabilities.

Cons: Only compatible with small number of Bluetooth-enabled phones. $399.99

www.circiutcity.com

Lowrance iWay 350c
Pros: Strong receiver, 3.5” screen, compact design, long battery life.

Cons: No text-to-speech technology, small hard drive. $282.00

Navigon 7100
Pros: Subscription-free traffic, reality view, 4.3” screen.

Cons: Bluetooth phone interface doesn’t synchronize phone’s contact list or call history. $549.99

www.bestbuy.com

Garmin nuvi 680
Pros: Location-based services provide real-time information on traffic, weather, gas prices and movies on a 4.3” screen.

Cons: Price.        
$759.99

www.overstock.com