What you use to the best advantage probably depends as much on your belief system as anything. There are theories about which might be more attractive to you which will take you in a different direction.
My personal concerns considering components is, fundamentally, to provide isolation for components most possibly affected by incoming vibrations thru the floor. Its tought to control airborne vibrations and, FWIW, I don't believe that, except in theory, cement floors transmit vibrations.
To provide such isolation I like the concept of a combination of sorbothane type products with a very low resonance point in combination with a wood product with a medium/low resonance point. I would like these products not to be suseptible to airborne vibrations as much as possible as that could exacerbate the porblems they normally contribute. If you have a wood floor I would put a very hard surface under the supports of the stands to create a surface that minimizes vibrations from the floor, much like having a concrete floor. If you do what I suggest then I don't think it makes any difference whether is the stand itself is metal or wood. The sensitive components will be fairly well isolated.
If you are impressed by the theories about 'draining' vibrations from the components when the vibrations are the result of the operation of the component, and the theories involve 'coupling', and you must make a decision about competing theories and benefits, IMHO consider that 'amplitude' of the deterious vibrations (or resonances) may not create such a conflict as to incorporate or avoid both techniques.
FWIW. Sorry, I couldn't give you a simple Metal v Wood response. Personally asthetics is far more important to me as to the 'rack' itself than anything else.
My personal concerns considering components is, fundamentally, to provide isolation for components most possibly affected by incoming vibrations thru the floor. Its tought to control airborne vibrations and, FWIW, I don't believe that, except in theory, cement floors transmit vibrations.
To provide such isolation I like the concept of a combination of sorbothane type products with a very low resonance point in combination with a wood product with a medium/low resonance point. I would like these products not to be suseptible to airborne vibrations as much as possible as that could exacerbate the porblems they normally contribute. If you have a wood floor I would put a very hard surface under the supports of the stands to create a surface that minimizes vibrations from the floor, much like having a concrete floor. If you do what I suggest then I don't think it makes any difference whether is the stand itself is metal or wood. The sensitive components will be fairly well isolated.
If you are impressed by the theories about 'draining' vibrations from the components when the vibrations are the result of the operation of the component, and the theories involve 'coupling', and you must make a decision about competing theories and benefits, IMHO consider that 'amplitude' of the deterious vibrations (or resonances) may not create such a conflict as to incorporate or avoid both techniques.
FWIW. Sorry, I couldn't give you a simple Metal v Wood response. Personally asthetics is far more important to me as to the 'rack' itself than anything else.