The best replacement for garmin is tomtom.

The best alternatives to garmin are rated as following:
★★★★★  tomtom
★★★★  magellan
★★★  polar
★★  lowrance
★★  magellan gps
★  suunto
★  fitbit
★  gopro
★  tomtom gps
★  raymarine
★  google maps
★  tomtom reviews
  tomtom comparison
  timex
  navigon
  navman
  skycaddie
  nike watch
  mio
  polar hrm
  cell phone gps
  gps
  papago
  nike running watch
  tom tom gps
  magellan reviews
  polar watches
  tom tom
  nike+ gps watch
  tomtom cnet
  tomtom iphone app
  simrad
  tomtom go
  tomtom which is better
  tomtom which is best
  magellan comparison
  avidyne
  trimble
  strava
  delorme
  tomtom iphone
  tomtom better
  sky caddie
  tomtom traffic

Your alternative for garmin is not listed? Suggest!
Speaking about garmin, one probably shouldn't forget about lifetime maps.

Other search terms related to garmin and their ratings are:
★★★★★ lifetime maps
★★★ chest strap
★★★ lane assist
★★ route planning
★ google earth
★ lifetime maps and traffic
heart rate monitor
You have in mind a companion for garmin and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of garmin in all years. Click on graph for more.
garmin
tomtom
magellan