Well I have heard Bub's Marantz get disturbingly close to his CDS2, after confusing myself with the remote as to which was which,  I would say I could hear a difference but it wasn't huge and certainly nothing like 5Ks worth.   Oh and the Marantz was on one level of Mana below the Naim.

 I have challenged Mick Parry to try this one when he is in Glasgow,  but so far he seems reluctant.   Bearing in mind that the Marantz and the Naim use the same transport and DAC maybe this result is less unexpected than it would seem.