Any VTL experts in here?

@rblnr JJ

Mildly OT:  does anyone know what brand 12AU7s VTL uses in the 6.5 II preamp?  Much thanks.

I can not carry a conversation with Bea Lamn nor local dealership. They’re more interested to  discuss on new and current models and what they have in stock ready to take in order...

"Better" or "Best" is what I try to avoid. Why not call VTL and see what they might be able to share on the pros/cons of the S vs. MB models, in a general manner, but also for your speakers. I have the the Amati Futura and these need serious current drive to get the woofers to come alive.  Sadly many well-reviewed "high-power" amps, SS and tube, choke with these speakers.  If you seek a tube amp, you should also consider the Manley amps AND CAT.

Bump*Anyone else?
. S-400 version 1 (not current version 2) or
. MB-450 version 3 (current technology)
Which one is a better performer?

I have the 450MKII Mono Blocks.  I'm the second owner, I got them from Friend, neither of us have had any issue's. I have never heard the S-200 so I won't comment.

Or will I be satisfied with the lesser S-200?