How important is it to have your rear channels timbre matched with your mains and center? I am trying to appease my wife with the rear channels that will be wall mounted, she does not want any black box hanging on the wall. She likes the Boston Acoustic Bravo speakers for their ability to be mounted in the corner of the ceiling. I was leaning toward the B&W or Axiom bookshelves, but they do not offer a pure white surround. Would matching these speakers with the BA Bravo's be a mistake? PSB Speakers have a decent looking surround that is all white, are these speakers OK? Thanks in advance for your thoughts and ideas.