I was looking at the NAD 2200 that is for sale in the Flea Market. As long as I have owned audio equipment, I have always gone the route of an A/V Receiver. Currently, I own a NAD T761 A/V receiver. Can someone explain what the benefit would be to adding an amp such as this to the NAD receiver? The receiver has pre-outs for all channels. Could I use this amp to bi-amp the RTi70s? Would there be any benefit in that? Excuse my ignorance, but I don't know much when it comes to receiver vs. separates vs. a combination of both.