Depending on your sitting height, I think you'll discover they are too low. I've got a pair of 21" four-post stands that are wonderful stands. In my home office, they work fine. In my family room, they were too low. Slide a 2" or 3" slab of butcher block under the stands.
I own a pair of Fritz LS/5-R which are essentially the same sized speakers (same woofer with a ring radiator tweeter), 83dB. Excellent sounding speakers IMHO, but one needs the right amp to make them sing properly. [Just noticed this is in the Salk circle; don't mean to step on toes.]