Colo-colo, Congratulations on your Contriva purchase. I do not have the Contriva's but I do not see a problem with the Classe amps. Of course good upstream components and good cabling helps. You also mentioned something about Vitus. A highly thought of audio company. I am guessing the Contriva's would love those amps.
I am sure some Contriva owners will weigh in.
Johngp, Loving my Piano Diacera's. If I had to list one thing that impresses me the most about these speakers it would be overall presentation. These speakers definitely do not lose the forest for the trees. Sure, they do an excellent job in all those areas people obsess about, i.e., imaging, detail, tonality, prat, etc. You can easily focus in on each of these areas for a short time but you are inexorably drawn back to the overall presentation of the music, the same experience as listening to live music. When listening to live music no one focuses in on, for example, detail or imaging because they know it is there automatically. Same with the Piano Diacera's. Just a quick impression on the fly.
