I have, but I just don't think they will sound that much better than the current set-up. Also, with the way I have the wires running (hidden) it would be a pain to re-wire everything to put the B&W's on stands in front of the cabinets or fireplace.
My room isn't exactly a perfect HT room anyway (acoustically), so this set-up gives me the best balance I can find between aesthetics and performance.