What is everyone using for dedicated AC lines???

I need to buy some dedicated AC cable.

What is everyone using? Romex?

I want the best performance, I will tear out the cable when I leave the house. If its not up to code, oh well, I'd rather have better performance anyways.

I thought about 10/3 Romex for the amp and 12/3 for the CD/Preamp.

What do you think?

Please, no arguements over this I need to buy cable ASAP!