Belden has always made the best cable, and I believe is the largest manufacturer in the world. As for the connectors and jacks, Radio Shack does not make them, they only distribute them. Most 1/4-inch jacks are well constructed, as are the XLR plugs, however, there is some minor difference in quality, and price is not always the determining factor.
Before the sheet rock is placed on the walls, this is the time to plan, layout and run the wiring. If the studs are 2X4s, a 1/2-inch auger bit can be used to drill the holds to run the wires through. Place the back boxes a minimum of 18 inches above the floor, which is usually specified by state electrical codes, before the sheet rock is put in place as well. Standard recepticle boxes are all that's necessary, which will provide you with professional-looking, flush-mount wall jacks that will last for years to come. Some electronic stores carry pre-mounted 1/4-inch phono and XLR plugs that have already been installed on stainless steel recepticle plates. They're a bit more expensive, but can save you lots of time and labor.
If at all possible, try to route your mic and equipment cables well away from any AC wiring. This will help reduce the possibility of 60-cycle (Hz) interference.
Good Luck,
Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)