Just confused

Hi I am fairly new to using high quality audio equipment.  I have assembled all of the gear I want for listening/enjoying the music.  Of course it’s only a matter of time before you ask yourself “What if?”.  I understand that room acoustics matter so I am off trying to implement acoustic panels - some good relatively consistent advice here.  What I struggle with is the subject of vibration control/isolation ... the advice from the community is not very consistent.  The floor in my listening room is slab cement with ceramic tiles on top.  I have Avant-garde Uno speakers (with spikes since that is they way they came), REL subs (rubber feet) and effectively an unbranded equipment rack (with spikes).  Are spikes what I should remain with for this kind of surface?  Does it make more sense to decouple the speakers and rack from the floor with some kind of isolation device?  Should I be replacing the current metal spikes with “cones” (or other device).  Should I use the same device for speaker and rack?  I just want to avoid shelling out a bundle of money for something that may turn out being a negative.  Thanks in advance for your patience with my naive questions.