Amp Recommendations

Quicksilver is a solid choice in that price range. 

@jbeckley42 

I can understand why your friend believes that 30 watts is not getting full potential from the MLs.  

However it is doubtful that a 100 WPC tube amp will fare much better- they just don’t have the reserve power that a smooth solid state amp would have and usually are rated at lower power with decreased impedance loads. 

I suggest a solid state amp that can "double down" as the speaker load is reduced.   With panel speakers I have heard excellent systems driven by the higher wattage Tube D topology of the Rogue Audio DragoN amplifier- 

https://www.audioadvisor.com/radragon-sil?sku=NEW-RADRAGON-SIL&setCurrencyId=1&gad_source=1&gad_campaignid=21463913452&gbraid=0AAAAAD_hUXXdZejlf3_vbS19HVafxbxeN&gclid=EAIaIQobChMIuNOUqYe7kQMVEVN_AB1CBCHJEAQYAyABEgLePfD_BwE  

Another contender is a used smooth sounding Mac amp, this one would do the job nicely. 

https://www.usaudiomart.com/details/650271441-mcintosh-mc302/

@jbeckley42 as a 30+ year owner of M-L Electrostatic hybrids, ignore the naysayers about "home theater" speakers. They likely have never heard a quality set up pair of M-L hybrids (thank you Best Buy for underselling these with Yamaha receivers!). The stat panels need high current amps. I have heard fabulous sound with ARC tube on M-L hybrids. In my system I have had Aragon & Krell amps sound fantastic, but haven't owned tubes. I would also look into VTL, Cary & Quicksilver. Many M-L owners have had positive reviews with the Sanders amps as well. A newcomer that I have not yet heard paired with stats is Advance Paris. Not too expensive and seems have have a wide dealer network for new tube-based amps. Good luck.

Not surprisingly, I agree with several of the above to replace the MLs. 

BOL

That is a really nice set of amps.