I have 7/8 year old Martin Logan Quests as sides and as rears. Since the rearward sound of these is as loud as forward,I put carpet tiles around the corner walls that are close by. The result is great (no "bounce, echo, reverb),and they work well with the M-L Prodigy's at L&R . The Quests are no longer expensive.
Hope this helps. Don
Hope this helps. Don