What is the best value (not necessarily the cheapest) satellite navigation unit?

Having spent plenty of time researching this very question I would recommend the new Navman F20, it has all the functionality of the ICN 530 it replaced and is cheaper to boot.|||why do you need one? do you get lost often going to work?|||garmin street pilot. i think its less then 拢100 now and it does the speed camera warning and everything. thats what ive got, its good|||hi my husband says the tom tom ones are the best.|||i'm hopeless finding anywhere and have a TOM TOM ONE, it's brilliant if you have the postcode it takes you straight to the door !!