Dubzilla,
The McCormack is excellent paired with the Europas, it has alot of power and is an excellent all around amp. I have been contemplating the Gold revision but also have been thinking about tube amps too. Based on the latest review, the AES Six Pacs seem a good deal but I don't think they have enough oomph to push the Europa's properly. I think Roy said they need at least 75 tube watts.
Regards,