All the substances mentioned 'ring', best to return to wood. Acrylic and glass are used by the major supplies because they look nice and are cheap to source. Carpet wrapped glass would be an alternative.
Something to replace glass shelves....
I presently have 1/4 inch glass shelving under four of my 2 channel stereo/home theatre components on wall mounts. I want to put the glass back into my Bello Getti rack and replace it with cast acrylic or maybe carbon graphite. Carbon is very expensive and if I choose 5/16-1/2 inch cast acrylic the price is still pretty good. Even in black with polished edges. Can anyone help out which is better for vibration/resonant control and sound qualities. My components are a power conditioner, belt drive CD player, bluray player and pre processor. Any suggestions are appreciated. Thx in advance.