I had in-wall speaker wiring installed as part of whole house audio in our new home. For example, in our family room the builder installed what they claim to be home theater speaker wiring. We have 4 in-wall speaker locations. I realized recently that I need a center channel speaker as well, in addition to a subwoofer. Anyway I am researching the in-wall speakers I should buy. I have seen Niles speakers in a store. What else is out there for in-wall speakers? I don’t know how powerful these speakers should be, etc. Thanks.