There are plenty of good reasons to have an immersion blender and I like the Bamix. For the stated purpose of whipped cream though I always rely on my classic hand cranked egg beaters. They do a very nice job on whipped cream. They are light weight, quiet, quick, and need no electricity.
A ‘trick’ that I use when I make whipped cream. I use two nested mixing bowls. I put ice, salt, and water in the larger bowl. I nest the smaller bowl in the cold brine and whip the cream in the now much colder small bowl.