I'm looking at some decent HT speakers and CC has some open box Polk R40 speakers fro $280 and I can't decide between those and some JBL N-38 speakers from JBL. If they're open box items what exactly does it mean? Could they have been used for a year and then returned or are they just returned because somebody didn't like them or got them as a gift and demoed them but didn't want them? Also, if you buy open box items at CC does their speaker upgrade within a year policy still apply to those as well? Thanks for your help!