I have the C-315 for some time so I think can shoot some opinions. I like its highs and the basses are ok (even if the basses are a bit over-emphasized) what I find a bit 'strange' are the mids... they seems a bit muffled, muddy like they aren't fully exploited.. it isn't BAD but it's nothing to shout about. What do you think? Warm speakers could be the cause? Mine Tannoys does not seem that much warm... highs are clear even with the NAD (that someone says 'smooth' the highs).