Also have you electrician run 10/2 WG Romex. This is the largest guage romex that is solid and still fits in our receptacles. Your electrician will probably not be to happy as 10/2 WG is very stiff, but insist on it. You can use a 20 amp breakers for these runs and if you ever have any beast amps you can bump the breakers up to 30's. Also I always advise if you are going to run two dedicated circuits run three, if you were going to run three then make it four. You never know when you may have a sub or two and want the extra dedicated circuits.