I've always wanted to try the QS8 surrounds but was leary about not matching my fronts & center. I've heard both sides on the topic...some say all speakers should match & others say as long as the front stage is timbre matched the surrounds can be from a different manuf. I know about the return policy but I'm just sending out feelers because I'd hate having to send them back if they didn't work out. So the bottom line is this...can surrounds co-exist with other speakers without causing issues. Thanks