I have a Pioneer 1014 driving Athena Micras right now. Is it worth it to get two additional Micra speakers to upgrade to 7.1 surround? I see a set of Micras on ebay and thinking of bidding for it. But is the difference noticeable? Is it worth it? Everything sounds quite good now but will 7.1 sound even better. My living room is not very big, maybe 13' X 12 '. The two additional speakers would be placed at the sides of the primary couch. Also, the ebay speakers does not have the grill so I would need to buy the grills from Athena, plus speaker wires, of course. Thanks.