Recommendation for a dedicated line wire

Looking to wire my room with 2 dedicated lines - one for the amps and one for the sources. I will appreciate your recs for an in wall wire. I need about 60' for both lines and I'm trying not to spend more than $20 a foot.
Thanks in advance.
I used 12awg Romex with very good results.
Can pick it up at most hardware stores.

Cryo'd Romex from VH Audio,

It was a definite improvement compared to standard 10 gauge Romex in a friend's system.
Tls49 Hi, I did not know the industry made Cryo'd treated Romex receptical wire cable, very interesting, I have 10 gauge Romex now, you said that the cryo treated was an improvement, I suppose you are talking about 10 gauge cryo treated wire compaired to none treated 10 gauge?, how much money per foot for the cryo treated 10 gauge Romex?