$88 on Amazon
Polar H10
Offers excellent accuracy for various activities
$79 on Amazon
Wahoo Tickr X
Provides a great balance of features and comfort
$130 on Garmin
Garmin HRM-Pro
Features a long battery life and accurate chest strap heart-rate monitoring
$29 on Amazon
CooSpo H808S
Offers great value for money
$160 on MyZone