do you listen to music in 2-channel??? is so, maybe a pre-amp for 2-channel listening and an a/v receiver for HT

how do the m60s sound?? i am looking to purchase the m50s maybe the m60s not sure yet and a CC. I presently have the denon 2801, but I am researching to find a pre-amp for 2-channel to compliment my a/v receiver when I listen/watch HT. Also, I have the cambridge d500se...let me know which way you go, because our systems have similar components.....