Here are several GPS comparison tools, allowing you to pick specific GPS receivers for a head-to-head comparison:
Garmin
- Our own Garmin nuvi comparison chart
- Garmin auto GPS comparison
- Garmin basic handheld GPS comparison
- Garmin mapping handheld GPS comparison
- Garmin running GPS comparison
- Garmin cycling GPS comparison
- Garmin marine GPS comparison
Magellan
- Our own Magellan GPS comparison chart
- Magellan Maestro comparison
chart from TigerGPS
- Magellan GPS comparison
TomTom
- Our own TomTom comparison chart
- TomTom comparison tool
Mio
- Our own Mio GPS comparison chart
Additionally, at the beginning of each of my GPS reviews, I try to compare it to the units above and below it in the same product line.

UPDATE: Before you get too excited, 

many sources of 
UPDATE: Most of the several generations old StreetPilot series, including this model, has been discontinued. For a more current recommendation, check out our 

