I would not consider the levinson 400 series fast amps. In fact, it is one of the reasons I did not go ahead and purchase a pair of 436s. On the other hand, the 532 (not the H series) is a much faster amp.
Sonus Faber - Stradivari - Amp and Pre
I currently have SF Cremona driven by a Classe CP-65 pre and a Levinson 432 amp. I am looking at the possibility of a pair of Stradivari. Any thoughts on how the Classe and Levinson would match with the Strads? I realize that this class of speaker normally would call for a higher end electronics, but the Strads are enough of a stretch. Upgrading electronics is probably not in the cards. Thoughts?