I use a Musical Fidelity A-300 with my N 804's and am perfectly happy with what I hear. You may want to give that or, perhaps, the new MF model a listen.
One caveat - aside from listening to them at the dealer with more expensive Krell/McIntosh equipment (both which sounded fine), I've not listened to them at home with anything else so can't compare to any of the other suggestions.
One caveat - aside from listening to them at the dealer with more expensive Krell/McIntosh equipment (both which sounded fine), I've not listened to them at home with anything else so can't compare to any of the other suggestions.