Be consistent with brand?

I have only one brand of cable, including interconnect cable (RCA and Balanced), speaker wire, power cords, internal wire in speakers and video and audio runs in my surround sound system. Makes a perfect package for the sound I want. I guess my vote is for all one brand at this point.

Sugarbrie, I have done essentially what you describe. My phono, preamp, speakers and amplifiers do contain the same wire I choose for speaker cable and interconnect. There are hundreds of feet of wire in every stereo system that remains unaccessible to the end user. Examples are chokes, transformers, wire wound resistors, discrete volume controls, coils, printed circuit boards and other wire based products. Once the input and output wires have been replaced, and the wire in the speakers, along with the cables we are discussing, it is about as far as it can go to being entirely consistent with brand.
That being said, I am totally pleased with the results of a single "wire product" system.