Ultimate pre/power amp for Sonus Faber Memento

Hi,

I'm on a quest for new amplification for my wonderful Sonus Faber Mementos. I'm currently using a Pathos Logos intregrated parnered with an Audio Aero Capitole CD-player. Cables are Harmonic Technology Pro-9 + Pro Silway. I do believe that the Pathos is the weak link in the chain at this point.

I'm aiming for the following:

1. A stable, trustworthy amp to hold on to for a long time (> 5-10 years).
2. Great dynamics, timbre and imaging are all things that I strive for, where I do favor midrange and treble excellence before "bass slam" as I mostly listen to sing and songwriters, small scale pop-music etc.

I'm open for either tube or transistor, even though the latter usually has an advantage when it comes to "trustworthiness" and ease of use.

The contenders so far:

1. Audio Research Ref 110 + LS26
2. BAT VK600SE + ?
3. ASR Emitter II Exclusive Version Blue
4. Mcintosh 2102 + C220

These are all more or less within the same price range (used) here in the northern parts of Europe.

I would truly appreciate additional contenders based on your experiences!

Many thanks!

/Marcus