True but the cost of cleaner power is too high. First of all you need an AVR which has pre outs at the least (Denon 3600 upwards ?). Then you need a power amp which in the least will cost about INR 30 K for a cheap one ? Compared to that the difference in sound (perceived) is negligible. Also the AVR then lies underused since it is barely using 70-80 watts out of 100+ watts available. Hence its a more effective solution for cheap AVRs but the irony is that the cheap AVRs dont come with pre outs