For your short runs I'd recommend 12-2 wire on 20 amp dedicated breakers, as others said it will be easier to attach to your outlets, and should you ever decide to switch out your outlets in the future it will be easier and lessen the possibility of damaging your AC outlet when you have to push the outlet back into the outlet box (I've been there and actually broke some high-end outlets).
In my main system, I have six dedicated outlets that are between 50 to 60-foot runs. I experimented with 12 and 10 gauge wire including cryogenically treated wire. I honestly could not detect a difference in sound or performance, however, I realize for peace of mind many will suggest 10 gauge wire and/or specially wire.
I do hear a difference with cryoed vs non-cryoed AC outlets.
In my main system, I have six dedicated outlets that are between 50 to 60-foot runs. I experimented with 12 and 10 gauge wire including cryogenically treated wire. I honestly could not detect a difference in sound or performance, however, I realize for peace of mind many will suggest 10 gauge wire and/or specially wire.
I do hear a difference with cryoed vs non-cryoed AC outlets.