demoed my k17s fed from a naim n-vi today was quite impressed with the sound quality in stereo, dvd-a, and surround have k4s as rears have been using a denon 3805 up until now, so i dont agree with the posts on here saying mks are no good for stereo, i feel it makes a big differance in what is driving them, also considering the n-vi is only rated at 50watts per channel it seemed to drive them with ease