suggestions on affordable equipment stands.

i have a basic stereo system with lots of tweaks because this is part of the hobby i like. my goal is to get the best sound quality for budget prices so i use emotiva amp, pre and cd. music fidelity vdac. magnepan mmg speakers with dual deq velodyne subs. i have improved the performance of my system with isonodes , room tune and bass traps room treatments, furman and ps audio ac improvements and all morrow audio cables. today i put all my gear on a slab of concrete resting on tennis balls and some thick wood butcher blocks between each component. the system was on a glass shelved metal rack from walmart. isolated with vibrapods but still from walmart. the sound quality is improved and i suspect resonance from the metal and glass were a problem. any opinions on this or suggestions about a inexpensive rack that would help ? thanks john