My new system consists only of a carousel DVD player and an AV receiver connected by an optical digital cable. The DVD video signal is sent straight to the HDTV by component video cables (from Lowes). I'm completely satisfied w/ my current sound and video performance.
My M60s are connected w/ 12 gauge Monster copper that I picked up for free, but I would be just as comfortable using the 12 gauge garden lighting wire that I use for my QS8s.
No amount of psuedo-scientific marketing BS or anecdotes from delusional consumers will lead me to part with a single dime in the name of "wiring upgrades".
