What tube amp mates well with Sonus Faber Amati's?

I have recently purchased a pair of Sonus Faber Amati's and have not yet decided on an amp. One of the amps I have considered are the Cary 805c's however i was told the bass may be a bit defficient. The speakers are 92db efficient and are rated nominally at 4 ohms. The lowest dip is to 2.9 ohms. I would appreciate any thoughts on the Cary/Sonus Faber combination or any other amplification suggestions regarding this speaker. Thank you