> Do you use a manual grinder as well?

I have, in my life - I associate them with pour-overs (V60, Chemex) for myself. In my espresso setup, I have an electric variable-speed single-dose conical burr unit. It’s naturally fairly quiet, and I run it at ~30rpm so about all I hear is bean crushing/grinding.

That sounds pretty nice! I have a Niche Zero and it's fairly unobtrusive, but still somewhat loud. At least it doesn't have any high frequency noise though.

I haven’t personally used a Niche, but have studied them a bit and think they might be a high water mark in the performance/$. A busy cafe I frequent uses them commercially (modified, for extra cooling) with success.