Summary: Our house came with surround sound but had Aim 3's in the front and Aim 1's in the back. Never satisfied with the sound. Bought the Aim 5's and put them across the 3 front speakers. Moved 2 of the Aim 3's to the rear positions. Note that Aims come in 1 through 5 versions...5 being the best. Also have a separate sub woofer. Sound is much better now. Much more depth of sound which is especially an issue with ceiling speakers. Well worth making the change.