One important thing that is being over looked is the grounding. The ground is where all the noise in the house is picked up. Install a separate ground rod for your dedicated line. Keep it off the main grounding strap in the breaker box.
FYI - JP Labs make a power line cable to be used in place of Romex. However, it is very expensive at $15/foot. I do not think it is worth it.
FYI - JP Labs make a power line cable to be used in place of Romex. However, it is very expensive at $15/foot. I do not think it is worth it.