In Your Opinion - Which is The Best GPS Vehicle Tracking System or Portable GPS Unit for Tracking

Cobra Nav One 2500

Garmin GPSMAP 378

Garmin GPSMAP 478C

Garmin GVN 52 Black Box

Garmin Nuvi 350 GPS

Garmin Nuvi 360 GPS

Garmin Nuvi 660 GPS

Garmin Quest 2 GPS

Garmin Quest GPS

Garmin StreetPilot c330 GPS

Garmin StreetPilot i3 GPS

Garmin StreetPilot 2720 GPS

Garmin StreetPilot 2730 GPS

Garmin StreetPilot 2820

Garmin StreetPilot 7200 GPS

Garmin StreetPilot 7500 GPS

Garmin StreetPilot c330 GPS

Garmin StreetPilot c340 GPS

Garmin StreetPilot c530 GPS

Garmin StreetPilot c550 GPS

Garmin StreetPilot i2 GPS

Garmin StreetPilot i3 GPS

Garmin StreetPilot i5 GPS

Garmin Zumo 550 GPS

Lowrance iWAY 250C GPS

Lowrance iWAY 350C GPS

Magellan RoadMate 2000 Portable GPS

Magellan RoadMate 2200T Portable GPS

Magellan RoadMate 3050T Portable GPS

Magellan RoadMate 6000T Portable GPS

Navman F20 GPS

Navman iCN 750 GPS

Navman N40i GPS

TomTom GO 510 GPS

TomTom GO 910 GPS

TomTom ONE GPS

TomTom Rider GPS