Can anyone comment on the sound of In-wall Klipsch speakers to floor standing KG-4's? My current configuration is Quartet's in the front, KG-4's for the rear, a center channel (just a Klipsch book shelf speaker), and a Klipsch SW-8 subwoofer. Using a Denon AVR-2801 as the receiver. Two questions are can an In-wall compete with the KG-4's if so which one? And what would you recommend upgrading to for a center channel?