Mike, are you planning on a major project like running wires through some walls or do you need basic assistance like wiring your receiver with proper connectors, setting up levels etc? I'm sure if you ask nicely
you can probably get someone from this board to help you setup your system, especially since an ep500 is on your equipment list.
I would recommend going to your local hardware store and buy some generic 12 gauge wiring. It'll work fine in most applications and cost less than the name brand.