Use 10/3 romex, not 10/2. The 10/3 feeder has a full size insulated ground and the wires are twisted which goes a long way in rejecting common mode noise while the 10/2 wires are parallel and acts like an RFI antenna. The added cost of the 10/3 will pay back after you’ll most likely find that power cords will have a much less affect over stock cords, as has been my experience.
Time for dedicated outlets!
I would like some advice on what exactly to tell my electrician to be sure I get what I need. Is just saying that I want two separate dedicated lines to the listening room sufficient or are there other key fraises that should be included in my description of the work I would like done?