Can someone steer me down the right path? I have been researching GPS Navigation Systems. Two that I am considering are the Tom Tom GO510 and the Garmin Streetpilot c530. Both run around $4oo. So far I'm leaning toward the Tom Tom. Any of you experienced GPS users got any pros or cons on these models or suggestions toward anything else in that price range... ~~~~~~~~~~ I lost twenty pounds. Unfortunately, I was in England at the time.