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 BT-Q818 boasts a fantastic battery life and speedy GPS performance, so it's an ideal receiver for the relatively inexpensive asking price.

Freedom's mini GPS is a solid GPS receiver in a compact package that works with most hardware and software combinations.

The BT-Q1000 does what it claims: it'll track your movements very accurately, as well as record places of interest at the press of a button, and map them on Google Earth. It can also be used for navigation when paired with a PDA or notebook computer and GPS software. However, its software interface will confuse the uninitiated.

If your mobile phone or PDA doesn't have a GPS receiver built-in, then the stylish and compact LD-4W is definitely worth a look.

The ATP Photo Finder mini is great for people who want to geo-tag their photos, but there are some drawbacks to its simplicity.