Our boat takes what The Broads dish out quite well with our whips.
I did my research and went with ones that were over-sized for our boat as well as very well made.
They've been on our dock since 2003 and still work great!
I'm quite sure they are from
Mooring Products International.

The comparison shot really made my decision.
If we have enough warning of a serious incoming storm, we do tie off the right front of the boat to a tree on shore.
This is because on rare occasions the wind and waves come in at just the right direction that the boat can kiss the dock. Even though it's on the whips.
We have a bumper on the dock post that gets hit... just in case.