This is for Georgehifi especially but others can chime in.

I had wonderful sound on my older model C1s with a Pass X250.5. It was a perfect match.

Now, I would like to hear them with Octave amplification as well who is distributed by Dynaudio NA of course.

Keithr it isn't that the Pass didn't sound good, Musicfx compared a Pass Labs integrated at $12k to a T+A Integrated an 2500R from the less expensive R series integrated amp, for $11k for use with a pair of Wilson Sashas and bought the T+A. because to his ears the T+A sounded better.

We have heard Pass numerous times, it is very musical solid state, it just doesn't have the speed and dimensional quality you get from the T+A gear, it is also way more colored. 

The Octave stuff is excellent if you want tubes

The very fact that Dynaudio was importing the T+A gear and was recommending the two brands says quite a lot.

The two companies parted ways because T+A felt that Dynaudio was more concerened with marketing of their speakers then actively getting T+A off the ground in the US.

Dave and Troy
Audio Doctor NJ. 

When I owned  a pair of Dyn C1s (not Platinum) I used a Simaudio i7 integrated. I listened to a T+A integrated at my dealer at the time, from the R series, along with a T+A cd player. To my ears the bass was taut but not as deep as the Dyns were capable of. The Simaudio i7 fed by my Supernova cd player gave better bass and overall presentation; weightier and fuller. The current model, 700i, has more power than the i7.
The C1s are a special speaker for their physical size. Hope you have many hours of delightful listening!

Thank you everyone for a spirited conversation. I follow these forums regularly and enjoy each of you. @keithr What preamp were you using?
   Simaudio 700 is an awesome match with the Dynaudio C1 and I should definitely consider it. 
  @audiotroy seem to get a bad rap on here. They are trying to sell gear but I take their enthusiasm as a love for the product. 

T+A was imported by Quartet marketing about 14 years ago. I have been carrying T+A Products since then. Yes T+A was also imported by Dynaudio for a few years because they showed together for a few years in Munich also.
T+A is brilliant stuff. If you're in Los Angeles, Come by and experience every product they make. Yes including their Mono Blocks too.