Back in the old days (25 years ago) when CDs skipped when you looked at them wrong, suspension was a solution. Suspending a rack from the ceiling via cables, ropes, chains, etc. seemed to provide decent isolation. Also, keeping the source devices slightly behind the soundstage helps prevent excessive vibration and feedback. Can even look cool too in that 80's sort of minimalist, industrial, halogen track lighting kind of way (well, it did back then?).