Just to correct some misinformation, the TX-NR787 and the TX-RZ630 may be similar, but they are 2 very different receivers. First, the RZ series has a plethora of upgraded components. The 787 is THX certified and the 630 is not. The 787 has a considerable amount more of total wattage than the 630, albeit the 630 is a slightly bigger unit. The face plate of all RZ series receivers are made of billet aluminum and the 787 is plastic. So, they are not the same receiver, they share similarities, but they are very different.