TomTom one or Maggelan roadmate 2000 or Garmin StreetPilot i3 Vehicle GPS Navigator?

Hi I am about to purchase a gps car navigation unit, basically I am driving from MO to Orlando and back and think it would be better than mapquest. Of these two that I mentioned above, what would you recommend and what are the pros and cons if you have experienced any? The Magellan and Garmin are almost a hundred bucks cheaper but the Tomtom seem to have more features , I don't know! But these are the three cheapest models out there. Thanks people.