Michael, you may find this link interesting with regard to audio cables
http://www.bluejeanscable.com/articles/humrejection.htm
If you're just looking for one cable for both A/V interconnects and coaxial satellite/cable patch cables, then I'd go with either Belden 1694A or Canare L-5CFB (this is not rated for in-wall use though just in case you need to run anything up into or through a wall). They are both around 30-35 cents a foot but you may find only find Belden in spools of 500 feet. I used a complete 500 foot spool of Belden 1694A when I rewired my first floor and basement for cable/satellite and used Canare for my patch cables from the wall faceplate to that various pieces of equipment. I used Canare F connectors which are easy to work with and just require two crimps - one for the center pin and one onto the braided shield. Pretty basic. I've recently used my leftover Canare cable to make some component cables using the Canare RCA connectors and electrical tape to label each individual cable with the appropriate color. They work as good or better than the Monster cable they replaced. One of the added advantages to making your own cable is that you can make custom lengths - for example, the Monster cable was always too short - it barely reached - but now, my 7 1/2 foot homemade cable is perfect lengthwise and there is no stress on the connectors.
The only caveat to the Canare cable it is thick and not as flexible as a stranded center conductor cable.
hope this helps,
--tom