Not sure what your speakers and stands look like, size, etc. so this might not work. But I raised my floorstanders up a few inches by going to Home Depot and getting a trailer block (or something like that). It's a $5 block of concrete approximately 14" x 14" x 3" that I painted black. They looked fine in my dedicated room, not sure how you (or your wife) would like to have them in the Living Room, or how they'd work with your flooring. But after painting they really didn't look bad, didn't look like concrete blocks.
Just a thought
Just a thought