If you start with a reasonably powered amp and know the speaker impedence and efficiency are also reasonable, and act reasonably, you don't need to spend another moment on this power issue. Copland stuff is well regarded and I suggest you just set the whole system up and avoid the avalanche of opinions you could subject yourself to regarding room treatment, tiny wooden speaker wire bridges, gigantic power regenerators, fuse direction, and hairstyle tips...however, MY opinions are to be cherished as True Art and a gift to the reader...I'm a giver.
