Okay, my 75-feet Mogami component and S-video cables have arrived. The 27-gauge coax wire used is much thinner than I imagined -- the individual wires are of less than 1/8" outer diameter. The component cable is configured as approximately 3/8" x 1/3" flat cable. These cables are very flexible, which is nice for on-wall installation; but their thinness got me a bit worried.

So, I very briefly tested them by simply swapping the cable from the DVD player to the projector. Since I do not have a component video switch box, Joe I could not do instantenous A/B comparison. I compared the images both in motion and still-paused.

Bottom line: At least under these conditions, I could not tell any difference whatsoever in image quality, with either the 75-feet cable versus a much thicker and shorter (6-feet) Acoustic Research component cable.

So far so good... one less thing to worry about (although something bad may still happen after I actually on-wall install these cables).