Solid pick though if stabilization is your top priority the Akaso V50 Pro/Elite or Brave 7 LE have noticeably stronger gyro EIS than the EK7000 and keep it working at 4K30. They also do a bit better on wind noise and overall mic quality. Whichever you choose, a chest mount for biking, a low deck mount for the kayak and and a little foam wind muff will smooth things out more than bitrate tweaks.
