Thanks. This just settled it for me. It sounds like the RC64 center (and probably all klipsch centers) are voiced and tuned for dialog clarity at the expense of a wider natural frequency response. I suspect other home theater companies most likely do this for center speakers as well. That's quite unfortunate. I felt like 2 RC64 as mains would have been perfect for midrange and clarity and would win with just about any music. I really like the sealed box as opposed to ported because I can shove it straight against the wall. I didn't care about the 10" woofers for bass, because I had a capable 15" subwoofer anyway. Oh well, I guess I'll have to make space for the RF7 III in the future.