I would go for the current model Krell amps. They are extremely smooth, but they are not high frequency monsters. The pairing with the Thiel (which can be harsh in the highs) is likely going to work very good.
The McIntosh may be another good choice as it is excellent, but mild and laid back in the mids and highs.
The McIntosh may be another good choice as it is excellent, but mild and laid back in the mids and highs.