Garmin GPS III Pilot every time.
I once had a Skymap II that went kaput and received absolutely no help from Skyforce (as they were then called).
I the invested in a Garmin III and have never looked back. Dont be put off by the smaller screen, it is fine and has some great features such as "highway in the sky" etc. that allows you to spend more time looking out of the windshield.
Mine came from a company with the initials of H M (and the last name is hard to spell if that gives you enough clues!)