I have been searching this forum for previous threads but I cannot find the answer that Im looking for. I currently have a Yamaha RXV540 receiver, however I am hoping to upgrade it. I need some help with the following alternatives, unfortunately I won't be able to audition them before I buy. Will I notice am improvement with the following, or are they just a direct alternative to my current Yamaha? Denon 1804 Marantz 5400 Pioneer 812 Onkyo 500 or 501 Will these receivers offer a marked improvement over my current Yamaha? Are they comparable to each other? Pioneer 912 Marantz 7400 Denon 2803 Yamaha 740 Onkyo 600 or 601 Are there any others that i should be considering? The receiver will mostly be used for watching SKY and playing DVD's with occasional music usage.