The XL adds a larger display to the already fantastic ONE unit. The new EasyPort mount and TomTom’s Map Share feature make this an enticing unit.

TomTom’s latest addition to the navigation market continues the company’s fine form when it comes to the user experience. The GO 730 adds some excellent software features to a package that we’ve come to know and love.

Without a doubt the best GPS unit Mio has ever released, the C520's delightful widescreen display, split-screen technology and text-to-speech navigation makes this one of the best units we've reviewed.

The ONE has received a facelift and although the improvements are largely focused around the aesthetics, this is still one of the best value for money GPS units on the market.

The C320 is very similar to the successful C520, minus a couple of features. It represents great value for money at this price point and is ideal for first time users, or those who just want a GPS unit without extra bells and whistles like Bluetooth and multimedia functions.

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.

Although the S150 doesn't have all of the features of its more expensive sibling, Bluetooth hands-free remains, as does the excellent navigational experience.

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.

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 S50 adds Bluetooth handsfree and NavPix for a reasonable price. Although there is no camera to take NavPix photos, it's still a useful application.

The Colorado 300 provides a slightly cheaper, non-touch-screen alternative to the Oregon 300. With both models proving good combination automotive/handheld GPS devices, the decision largely comes down to your preferred control scheme.

Navigon’s 2150max is certainly reasonable value at this price. Lane assistance, text-to-speech and Bluetooth hands-free combined with comprehensive safety warnings and a reasonably intuitive interface make it a credible choice.