Amplifier for Sonus Faber Extrema


I´ve just bought a pair of Sonus Faber Extrema Loudspeakers and I want to buy an amplifier for them (used).
My actual system: Krell Kps20i CD Player, Sonic Frontiers Line 2 SE Preamplifier, Classé Audio Fifteen Power Amplifier and Audioquest Volcano DBS Speaker cables (biwire).
I want to replace and upgrade only the amplifier and I want to still use the Sonic Frontiers because I love this tube preamplifier. So I´m loocking for an amplifier to use with the Extremas and the Sonic Frontiers.
Some options could be: Classé CAM350 Monoblocks, Krell KSA300S or Pass X250.5
I will apreciate all your suggests and recomendations.
elduende14

Reviving an old thread. I recently acquired a pair of Extremas. I am driving them with Pass Aleph 0 monoblocks but the consensus based on my review of various forums on the subject of amplification is that they perform best with high-powered and high-current amplifiers. I have the opportunity to buy a restored Mark Levinson 432 and was wondering if anybody has tried the speakers with this amplifier or has any thoughts on the subject.

Thank you.

Not sure will this help, but still...friend of mine had Extremas, he used to run them with Krell Fbp 300cx for years, only to replaced them with Amati Futura. In that period he got ML 332 which he completely refresh and said that he prefered Krell. Speaker cables were Audioquest Sterling.

Used to have SF Guarneri Homage, of all amps that I had or tried, Krell Evo 302 was best on it

Now driving my Extremas with the restored ML 432 I picked up a few weeks ago and it's a great combination. It is true that the Extremas to love gobs of solid state power and the Levinson's do the job very nicely.