I am early 60's and same height and 90kgs.
I paddle a 14' Naish Glide in flatwater and the Ocean. Anything from 8km to 20km.
I never intend to race and never would even consider racing. tahts for other people.
For my type of paddling this is the best all round board. it is stable, relatively fast, easy to get into swells and even surfs a small wave well.
ET.