Hello, several questions to ponder. I have a pair of Belles and thinking about adding a center channel. I have a academy and a pair of heresy's, which would be best? Also have the choice between a HK avr325 or Yamaha m45, c45, t720 amp preamp tuner. I'm leaning towards the Yamaha setup. I don't have the room for a full blown surround setup, just looking to enhance the pair of Belles. Help with some experienced advice please. Thanks.