I'm looking at buying some headphone amps for our little studio. It's a three-mic studio, one host and two co-hosts so we need 3+ channels of headphone amping. I would like, however, to have remote headphone amps for each of the co-hosts so they can turn up their own volume knob should they want to. Problem is I can't find a good solution that includes talkback. I want to be able to talk back to my guests (but they need to hear, not talk back themselves). So basically the ideal solution for me would be either three remote headphone amps or one rack unit that can serve two remotes, but still includes talkback. And it has to be talkback with an external mic input and prefereably also a jack for external switching on/off, like the Presonus HP60 has got. Anyone have any ideas on how I could solve this?