The Krell KAV-300il and new KAV-400xi are both rated @ 400-watts per channel into 4-ohms, which is plenty of power for most good Speakers, including the B&W Nautilus line up to and including the N802. These integrateds are as powerful as any 200-wpc into 8-ohms Amp. that I have heard, plus they have a very nice-robust-refined easy-on-the-ears (even at high volume levels) sound to them. I would definately consider either model when shopping for powerful well defined Integrated Amp.