I have 2 Dues as the rears. The 3.1s are not bi-ampable, in the normal sense. I drive the sub input on them using the Anthony Gallo Sub-Amp, while driving the speakers with the Arcam (front right/front left).
The Arcam and the Cambridge Audio work very well together. There is a musicality to the sound of CDs played through this system that I've aspired to for years. Functionally, the integration is such that the Cambridge's remote has amplifier control functions that didn't even need to be programmed for the Arcam - it just works.
The Gallo's are everything the reviews say they are. Their biggest strength is their imaging. Phenomenal. And the integration is seamless between the drivers, helped I'm sure by the lack of a crossover between the mids and highs. I heartily recommend that you give them a listen. The sub-amp adds a whole other dimension to the bass frequencies.
Incidentally, you have a very fine system. I really love you choice of neutral equipment.
How is the synergy between Arcam and Cambridge?
I remember years ago Galo getting a lot of press. I'd like new speakers, so what is there sonic signature of the Galo's to see if they would be a good fit for me.