If you are using a UNIX Operating system, you need to use a UNIX Keyboard: Sun Type 6 USB.
It has the right curvature (i.e. seen from the side, the keyboard is concave, not flat) so you can easily press the F-keys without lifting your wrists = no wrist pains.
It has Meta & Compose keys.
And it has the extra X11 keys on the left - that you can xmodmap to your liking.
If you use a keyboard with a Windows key sitting between Ctrl & Alt, you are NOT a True UNIX Sysadmin.
Good luck finding one