Leben integrated amps and Merlin VSM

Has anyone tried either the Leben CS-300 or CS-600 integrated amps (or even the CS-660P amp) with the Merlin VSMs?

How do they compare with the Ars-Sonum Filarmonia integrated amp or the Berning ZH-270 (that is the ZH-270 connected to a preamp; not standalone). I have both the Ars and the Berning and before I sent my Merlins to Bobby for an upgrade, I found myself still partial to the Berning/Joule combination. I'm anxious to get my Merlins back so I can spend more time listening to the Filarmonia. Nevertheless I would be curious what others thought of the Leben integrated amps.

Thanks!
dpe