https://www.raceseng.com/circuit-sph...mm-shifter-arm
I have a circuit sphere from Raceseng on my M3, and it's my favorite knob I've used on any car so far. It wins over my Graphx Fatboy by virtue of not being a billion degrees on hot days due to the delrin cover, while still being decently hefty.
Downside is cost. They aren't too cheap.