Martin Logan Illusion c34a

Both the ESLs and Illusion use onboard class D amps to drive the sub/woofers only... The Electrostatic panels are still powered by your outboard Yamaha amp... I really love Yamaha pre/pro/amps and use one myself... In my system and room I have found that my ESLs sound much better powered by an additional outboard tube pre and amp, in my case a PrimaLuna pre and SS McIntosh MC152 for music... And add my center and surrounds directly with the Yamaha pre/pro/amp for movies/videos... Call me crazy... I think that the Illusion would be a better sonic match your ESL 11As...

Thanks for your opinion, I spoke to a ML dealer and he recommended the illusion as well, maybe for a sale but also recommended an anthem 3 channel amp for front stage because the internal amps are anthem since ML is now owned by them, but he recommended the anthem so the sound  of the internal camps in the speakers and center would match the power going to them from the preamp. It all sounds good in theory dedicated 200 W to each of the three front speakers therefore freeing up the load on the Yamaha amp. I like tube amps a lot they sound so amazing but wouldn’t it have an odd match in sound when playing surround? 

Forward to your question about matching fronts with center and surrounds... Since I only play 2 channel music with the ML fronts and ML sub thru my PL tube pre and McIntosh SS amp it sounds holographic amazing... For movies the ML center sounds fine and ML surrounds are mostly sound efx , since they are all Martin Logans they sound great and blend sonically pretty well... As for the amps proposed, I would suggest class D amps for the sub/bass drivers and look at class A, A/B amps for the Electrostatic Panels... Those ESL panels can dip into the sub 1 ohm range at high frequency, difficult for some amp topologies...  And some room correction with REW and Bass/Wideband Absorbers and Diffusion doesn't hurt...