Bamix is the daddy of immersion blenders, aimed at professional usage. Heavy duty motor. Choice of blades. Built for pro-use. https://youtu.be/5dW0Jyo5uWs

My favorite was a my roommate’s plastic Braun from the late 80’s. It was plastic, which meant it did not scratch Le Creuset enamel or non-stick, it had a strong, removable shaft that could go in the dishwasher. It was Braun quality, Those characteristics made it the perfect stick blender. It is a shame that most of the premium blenders are now all metal and not dishwasher safe. Solid and robust plastic is preferable for use in a Le Creuset.

My perfect combo would be a Bamix and an older plastic Braun for the Le Creuset.