WillieWonka - I would caution you to be a little more responsible about repeating (mis)information like you did about Cardas. It is actually impossible for speaker cables to cause an amplifier to go into oscillation, no matter what the brand. They can cause a dead short occasionally, particularly if hooked up with + and - touching, but not causing an amp to oscillate. That would be something on the INPUT side of the amplifier, not the output side.
Actually Cardas and Ayre have long had a very good working relationship at the company level and the Cardas cables are one of the top choices for Ayre equipment.