Mac 501 or Classe CA-M600 for original SF Cremona

I listened to the Cremona M with the CA-M600 yesterday, and the pair worked beautiful together. I have not listened to any SF with Mac gear - is anyone pairing Cremona's with 401 or 501 amps? If I go with Classe I will likely buy the CA-M300.
Classe CA-M600 all the way. I'm running the CA-2300 on my Strads and its glorious (second only to my McIntosh 2301's).