I'm looking at the Rotel 1066 power amp to partner the 1066 pre/pro. Its 6x60w. Is this powerful enough for a room about 4mx6m? I'm not into huge volume and my Sony 1080 is plenty loud enough. I usually listen to music at about -40 on it. How does a 6x60w power amp compare to a reciever with 100w per channel. I think it said 60w into 8ohm (my Ruarks are). Don't quite understand the impedance bit so is this more powerful than my 1080 or not? I know the 1075 is only a little more money but it's quite a bit bigger and is only 5 channels. I plan to have a centre rear in this setup so the 1066 will be best if it's powerful enough. Any thoughts?