any Rethm owners out there?

I have a pair of Rethm Maargas that I've always driven with tubes.  Low watt Don Allen amps, 40-watt Golden Tube Audio, and 120-watt MFA M120 monoblocks.  Preamp is MFA Magus.

These are highly enjoyable speakers that are easily driven even by 4 watt amps like the Don Allen 2A3 SET but I was greatly surprised when i hooked them up to a pair of MFA M-120 monoblocks.  The bass tightened up, and dynamics increased and not in a subtle way.  The word effortless comes to mind.

I'm wondering what amps/preamps other are using with their Rethms, and also if anyone's tried using silver cables.  Thanks.