I am now the proud owner of a Sugden Masterclass cd player 
We are talking small changes here and one thing that is clear to me is how good the Marantz cd 17mk11 ki is.
The Sugden has a little more detail is little more open. The soundstage is Deeper. Bass is bigger.
Overall sound is a little less digital.
In some repects alot of money for the small inprovements.
(such is hifi)
I was lucky to find a secon hand pair at martinandersonuk.com – great store with safe delivery.
One of the best things about the Sugden is that it does not seem to favor any sort of music over another and does a very good job with those average pop cds (the wife seems to have so many of).
Moving to something like John Mayer – Continuum or Faithless – No Roots you get a very real sense of weight behind the player.
Build is good but so is the Marantz which I think will replace the Arcam in the dinning room.
All in all this is a player I can and will live with for a very very long time. To my ears it all matches well with no system weak link. I really think I can not improve things any more, the gains are just getting far to small for the outlay.