Sound Anchor. new or preowned doesn't matter. durable and it keeps its resale value.
love mine. got it used for a great price. one of the best moves I've ever made. racks do matter.
BTW, no worries about warping or decaying.
I am using the Solid Steel S3 series of audio racks. I highly recommend them. A five shelf audio rack would run you around 999.00. I use one for my ultra heavy Mac gear and it also solved an acoustic feedback problem with my turntable. The racks are made in Italy. I purchased mine from Music Direct..
I like the Salamander Archetype, but I wish that Salamander still made the twin platform (double-wide) Archetype shelf.
Personally, I don’t pay much attention to vibration control except with a turntable and loudspeakers. You don’t want your turntable moving. And you want sand-fillable speaker stands. However, with electronics, the need for vibration control is exaggerated, IMHO
Listeners say they want sound equal to a live concert, but how do they control vibration at a live rock concert? The answer is that they don’t.