Ever wonder what the best GPS units were on the market? GadgetHeat has just put together your guide to the top three satellite navigation unit’s we have come across so far.

Navman and Mio have revealed their new 3D GPS systems. The s30, s50 and s70 satellite navigation systems give you a whole new picture. The question GadgetHeat asks is do we really need to see any more?

KITT Industries keeps churning them out from beyond the 80’s. This time Mio has taken over the mantel and produced the KITT Knight Rider GPS. TomTom needs to take a back seat, KITT called shotgun…