The best replacement for 310xt is edge 500.

The best alternatives to 310xt are rated as following:
★★★★★  edge 500
★★★★  210
★★★★  610
★★★★  910xt
★★★  410
★★★  305
★★★  timex global trainer
★★  405
★★  405cx
★  rcx5
★  polar rcx5
★  305 garmin
★  910
★  global trainer
★  rs800cx
★  garmin 410
  forerunner 405cx
  motoactv
  garmin 305
  forerunner 305
  garmin 405
  garmin 610

Your alternative for 310xt is not listed? Suggest!
Speaking about 310xt, one probably shouldn't forget about cadence sensor.

Other search terms related to 310xt and their ratings are:
★★★★★ cadence sensor
★★★ foot pod
★★★ powertap
You have in mind a companion for 310xt and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of 310xt in all years. Click on graph for more.
310xt
edge 500
210