thieliste,
I agree that Cardas cables are a great match for Thiel speakers. I have tried out a lot of interconnects over the past year, but keep returning to Cardas Clear Reflection XLRs for my Thiel 2.2s. These ICs are so smooth and rich sounding while maintaining the imaging and transparency that Cardas cables in the Clear series are known for. If you haven't seen it already, there is a long, glowing review of the CR cables on the Steve Huff Photo website from August.
I've never heard the Clear Beyond cables, and I'd expect them to be great, but the CR cables are still the favorite cables of Angela Cardas, who can use any cables she wants in the Cardas line.