What ever kind of wire you get it should be shielded... the shielding is what will protect it from the RF. You can get regular household wire 12-2 w/ground for example in a metal shielded version.
A couple of other ideas (assuming you are not going to a higher end audiophile cable that is very expensive), depending on the length of your run you should probably run an extra line at the same time for your Gonzo Krell or ARC amps. Or you can run 12-3 w/ground (for 20 amp service) and use the red line for a second dedicated outlet, eliminating the need for a complete second cable. Also, you should drain to ground the shielding on the cable to further eliminate RF.
Then if you need it, consider conditioning.
A couple of other ideas (assuming you are not going to a higher end audiophile cable that is very expensive), depending on the length of your run you should probably run an extra line at the same time for your Gonzo Krell or ARC amps. Or you can run 12-3 w/ground (for 20 amp service) and use the red line for a second dedicated outlet, eliminating the need for a complete second cable. Also, you should drain to ground the shielding on the cable to further eliminate RF.
Then if you need it, consider conditioning.