I'm looking for an affordable Fitness Tracker for activities like running, cycling and cardio.

Currently look at Polar M200 and Garmin vivosmart HR+, these 2 seems meets my requirements?
any users here? mind share your experience with the watch?
Or any other recommendations(around 500 to 700)?

Functions:
-GPS
-Optical heart rate monitor
-sleep tracking
-steps count
-can integrate data with strava or runtastic