The 6110 Navigator is the first mobile phone to be released with full turn-by-turn GPS navigation out of the box, and despite some small issues, it's an excellent experience on the whole.

The AVIC-S2 is well equipped and despite a somewhat confusing map experience, it remains a recommended, if not outstanding purchase.

The C220 is a solid choice if you're after an entry-level GPS unit. Excellent maps, speedy performance and a competitive price may be enough to overlook the sometimes confusing interface.

Despite being an entry level unit and commanding a very reasonable price tag, the Navigator 3000 falls short in a few areas.

At this price, the LN500 is an excellent choice, especially for a first time user. Text-to-speech technology, solid Destinator software and a stylish, slim design are enough to put this near the top of your list if you are on a budget

The F40 is a mid-range unit, with an excellent user interface and clear maps. The included hands-free module only sweetens the deal.

The ONE XL adds a larger display and a new design to an already outstanding GPS unit. At this price, it's the best value for money on the market and combines excellent navigation and an outstanding user experience.

The 330 Auto Navigation is Nokia's first stand-alone GPS. The result is a solid, but not outstanding unit that is let down by an impractical address search method.

The gogo CM310 is a very solid navigation device, even though its multimedia features aren't outstanding. But a fast, distinctive interface, an included 1GB SD card and USB card reader and the presence of turning "blinkers" differentiate the CM310 from the crowd.

The N95 packs in just about every feature under the sun. Most are welcome additions, but there are a few issues that prevent this from being a great smart phone.

The S102 comes at a good price, but although the navigational experience was solid, it just doesn't do enough to command a glowing rapport. There are plenty of better options available on the market.

The StreetPilot c510 is a solid budget offering, and has a few features that are usually reserved for more expensive models.