Fankpiet,
Which amp/s are you now living with now? Did you end up with the Boulder integrated?
I've been seriously considering a similar system: Boulder 850's, balanced Placette, AA or Sim Andromeda source + Eidolon's. Not quite ready this year, but will be next. :)
Would you say that the Boulder 850's were a poor mate for your Opus Ceramiques, or do you believe that the 850's themselves are just "analytical"? Not knowing your system, room & preferences, but having my own opinion re: boulder... I found the Boulder 1060 to be as neutral as any amp I've ever heard. Not cold, bright or over-detailed... just without much character.
I haven't had the chance to listen to the Boulder 850's, but I understand they're supposed to be equivalent to 1/2 of a 1060. After reading your comments I'm wondering if the claim (likeness to 1060) is a mischaracterizationÂ… i.e. "definite character", and not positive?
Might it be the source or pre is just a poor match? Only ask because I've yet to hear a set of Avalon's sound anything less than superb when paired with Boulder.
BTW
Which source(s) are you using? Did you end up with a digital source that eliminated the need for a pre?