I had a glass Apollo stand for a while. I wasn't overly impressed with the quality (Nice split Oak legs in about a month!) So I built an AV Rack. The whole thing weighs about 80KG (Make it heavy it's not going to vibrate!) and is made from solid hardwood. I've yet to build another one for the HI FI but i'm sure it won't make any difference to the sound. But it looks nice (IMO)
I did take the trouble of building two concrete pillars for the speakers in my Hi Fi system purely to isolate the speakers from the rest of the room. I did notice a big difference by doing this, tighter, smoother, better extended bass. Not the kind of thing you can do unless you're laying a new floor etc. Mass loading the stands or speakers would have a similar effect.
A dealer once demoed a pair of JMLAB Micro Utopias too me, he insisted that the only stands that sound any good with them were the £800 stands that JMLAB build. 'Everything else sounds rubbish.' he said. I took them home and experimented. And to a degree he was right. I noticed the stands were very heavy. However, when I filled some Attacama stands with a mixture of sand and lead shot I suddenly couldn't tell the difference. The dealer wasn't best pleased when I told him, he was also disinclined to believe me..... Ah well, one born every minute.
But lets look at this sensibly, if a few grands worth of HI FI kit can be affected by the quality/design of a HI FI rack then something is very wrong with the design of the HI FI.
If the rack is solid, has plenty of airflow, a bit of cable management and is wife friendly it's plenty good enough.
As has already been said, unless you're playing with vinyl that's all you need.