I've got the 60s and was using the 100 center until a couple of weeks ago when I bought the 150. The 100 worked great and sounded great BUT the 150 is superb!! I noticed an immediate difference in loudness and how the 150 blended with the 60s in movies. The speakers seem to disappear because of the perfect blending. You will not be disappointed with either the 100 or 150 but IMHO, there is a noticable difference between the 2.