Though a relatively cheap price point is sure to entice, several gaps in functionality make the GPSMAP 76 somewhat undesirable. It is functional if PC connectivity isn’t paramount, but for the most part it's worth paying more for the extra features.

HP’s iPAQ 912 Business Messenger certainly boasts plenty of features, but falls slightly short of many offerings from competitors. The lack of included navigational software combined with a small display may turn some users elsewhere.

Although the GPSmap 60 is functional on at least a basic level, it has a black-and-white display and a relatively high price point. With no expandable memory, slow acquisition times and a confusing control scheme, there’s no reason not to spend a little more and buy the Colorado 300.

We were expecting big things from the 6210 Navigator, but the fact that turn-by-turn navigation is only free for six months is a huge disappointment. We can’t see the point of this handset when most handsets in Nokia’s new range offer GPS and Nokia Maps.

The much-hyped Touch Diamond had plenty of potential, but ultimately it is a hugely frustrating phone to use. A great display, stylish design and reasonable browser are let down by a sluggish and slow user interface. Unfortunately, the great eye candy of the Diamond isn’t enough to push it over the line.

If you want a fully fledged GPS navigator, you are best off purchasing either a portable in-car unit or a handheld device with a larger screen. If you want to track your fitness data, then the HGE-100 may be worth a look.

The E51 has some questionable design choices, which have dragged down the overall quality of the product, but it's a sturdy phone with all the features a business user could possibly need.

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 Navigator 7000 is outstanding for road safety thanks to its "Road Sense" subscription, but its navigational performance could be improved.

The MMP-401 is basically the MMP-501 in a smaller package and without the Bluetooth hands-free connectivity. It does a reasonable job for quite a good price.

The MIO A701 is a jack of all trades device designed to replace your mobile phone, GPS unit and PDA. Sporting a touch screen but no keypad, the versatile A701 also boasts a 1.3 megapixel camera and both MP3 and video players.

A solid option that is fairly well priced considering the features offered. The iCN530 is a good choice, but keep in mind that some of the newer Navman models offer refreshing interface changes and newer map views.