You need a good source, a good set of headphones, and a good headphone amp. I'm assuming you're talking about full size headphones, not portable or in ear monitor?
Innerfidelity might be a good place to start.
It would be helpful if you elaborate on what you've tried in your main system.
Innerfidelity might be a good place to start.
It would be helpful if you elaborate on what you've tried in your main system.