After a lot of "justifying" went with the Gecko at 1/3 of the price.
	
	
		Depends on what you realy want to do, but most maps/books these days come with GPS co-ordinates, and trying to find that camping spot among the dunes etc is a real brease with a GPS..
After looking at all the fancy ( read costly maping GPS's and the lack of maps for where I wanted to go unless you wanted to pay $500+), I opted for a realy simple and cheep Geko Garmin GPS, fits anywhere.. Runs for ever on a couple of batteries, combine with a cable ( which has a cigerette plug power ) for ~$49 and some free GPS software I dont get inbuilt maps, but get to do most things, and can upload/download all the stuff I need for a trip..
Hope this does not confuse the issues...