So I use this one: Elgato Wave Mic Arm (Low Profile) (mainly because it's a low profile arm and I'm more comfortable with one).

The Elegato or the Røde. I have the latter, but both are good.

You can't really say that. You have to decide what's best for you. We have the "ELGATO Wave Mic Arm swivelling arm". We would buy it again.