In my experience, wool is no better sonically than nylon. Several years ago, when I had a small, easily tranportable system, my friend and I did a test. We set up the system in my nylon-carpeted room and listened. Then we took the system to his similarly proportioned and outfitted room, but with wool carpet. Granted, it's far from scientific, but we heard absolutely no difference. IMO, get a plush nylon carpet with a nice, thick pad and save yourself a ton of money. Several audiophile friends of mine have had the same experience. FWIW.