[akl]

That's good for your mac mini, but not a normal use case for a server running sshd (needing to be quiet, that is). Something that might also work for you would be to limit inbound access from known-trusted ip ranges, as well.

Running sshd on a nonstandard port isn't in itself a bad idea (other than the potential difficulty of logging into the server later if you forget the port or something), but it shouldn't be considered a strong security measure at all.

[eru]

A normal use case for a server would not be keeping quiet, but conserving energy is very much on server people's mind.

[akl]

Absolutely! However, I would argue that if you are looking to conserve energy, moving the sshd port is not something that should be at the top of your list. :)