I'm contemplating a CD player upgrade and, being very happy with the sound of the C521BEE, I'm considering the NAD C542. In addition to this I'm looking at the Audiolab 8000CDE and the Pioneer PD-D6. I don't want to lose the warmth and musicality of my current sound but think I could get even more detail. I am slightly concerned about general reports of reliability in NAD CD players, although I have had no problems with the 521. Should I be worried? Has anybody heard the Audiolab? This seems to be a really good price at the moment - £299.99 at Super-Fi.