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.

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.

If you're on the lookout for a smaller and simple to use GPS, the Streetpilot i3 would be ideal. More advanced users will be frustrated by the limited control set and slow calculation speeds.

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.

If you are on a tight budget and don't require many advanced navigational options then the iCN 330 is for you.

As a basic, entry-level GPS unit at this price, the F20 does quite a fine job. It doesn't include speed or red light camera warnings and is thin on included accessories, but an easy to grasp interface and solid maps provide a pleasing navigational experience - even for first time GPS users.

The nuvi 250W is a solid unit and the widescreen display is certainly a nice touch for an entry-level model, but its missing a few features to warrant its price tag.

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 GPSMAP 76Cx remedies the flaws of the GPSMAP 76, adding USB connectivity and a microSD card slot.