Yamaha unveils the newest models of its flagship line of network AV receivers, the AVENTAGE RX-A830 and RX-A730. Like their predecessors, these models push the company's "Powered by Music" philosophy to new heights, and exemplify Yamaha's rich tradition of marrying the art and science of sound with a craftsman's passion and precision to deliver superior entertainment experiences to consumers. The RX-A830 and RX-A730 deliver high performance, intuitive control and easy connectivity for those seeking to get the most enjoyment out of music, movies, TV, sports and games…