The best replacement for 610 is 6450.

The best alternatives to 610 are rated as following:
★★★★★  6450
★★★★★  630
★★★★★  600
★★★★  5450
★★★  210
★★★  620
★★  620 garmin
★★  600 nikon
★★  615
★  6570
★  910
★  6176
★  8800
★  737
★  410
  810
  520
  910xt
  710
  lumia 710
  avalon 737
  hbh 608
  epson 810
  mbox 2 pro
  apogee duet
  310xt
  samsung galaxy ace
  305

Your alternative for 610 is not listed? Suggest!
Speaking about 610, one probably shouldn't forget about foot pod.

Other search terms related to 610 and their ratings are:
★★★★★ foot pod
You have in mind a companion for 610 and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of 610 in all years. Click on graph for more.
610
6450
630