Sorry Noob here. This is my second time trying NixOS as a desktop. I just did a new installation of NixOS on my main pc.
In Arch my goto kernel was the Zen kernel. Is something similar available on NixOS ?
What kernels do you use / has got the most out of ?
Yep, https://nixos.wiki/wiki/Linux_kernel. I use
config.boot.zfs.package.latestCompatibleLinuxPackages
since I use ZFS.