I have 2 Yamaha MX 1000 U Amplifiers in my system and I am thinking of getting 4 Cerwin Vega Classic CLSC-215 speakers the ones with 2 15" woofers per speaker. The room that they are going in is 24' X 24'X 8'. If this is too much overkill I could just get 4 Cerwin Vega Classic CLSC-15 speakers the ones with 1 15" woofer per speaker. Any input would be helpful.