I don't think that "professional" style headphones (that cover the whole ear, the kind radio announcers would use) would work.

You have at least two options if you want to use bigger headphones. One is to get a pair of powered speakers with a headphone jack, there are lots of these on the market. Another is a dedicated headphone amplifier, for example the Edcor 2020.

This setup with the empeg on the desk and small headphones works so well, I can't believe that others out there are not doing the same thing!

Listening to loud music with huge headphones lets people know that you'd rather not be disturbed without a really good reason. Small headphones don't communicate that message nearly as well.

Borislav