I own the Andrew Jones series speakers.... I really like them, but, I've never heard any actual "high end" speakers. Would I really benefit jumping up to something in the 300-500 dollar range? I was thinking of Polk rti a1's and the c4 center, or energy rc10 and cc10, or anything in that bracket. All suggestions and advice are appreciated! Budget is 500-700 hundred for the front 3, my receiver is a Denon avr391, dont really want to upgrade if I dont have to.