VTI works for me, You can also have marble slabs cut to size (locally) to place on top of the shelves unless of course, you just want to spend money.
I look at audio this way, what kind of resale value do these items (whatever) have? Are people willing to spend 60-70% of new for a used item? Are there more effective ways to spend your audio money?
If you really want to spend money try JM Sound they have some bitchin $$ racks that they can't sell.
Maybe you could work a deal.
MMM