I've read some posts that recommended having your HT equipment on a dedicated circuit(s). My house (built 1979, if that means anything) has both light switches and receptacles on the two 15A circuits I use for my TV/sub (one wall) and other audio equipment (different wall, different circuit). Should I have an electrician re-wire part of my house to have dedicated circuits for my HT? Is this a really expensive thing to have done? It seems like running wire from my service box to the two outlets I'm using would be very difficult (and $$).