Tube integrateds and Electrostatic Speakers

" Any one out there experienced with Martin Logan or other electrostatics and tube amps? Am currently driving my ML Summit Xs with 185watts of SS power."

Tubes are no problem. I drove my SL-3's with my VAC 30/30 (32 watts/ch). You don't need something that expensive, though. Quicksilver V-4, ARC VT-100, VAC PA 100/100, Cary V12's, SF Power 2 or 3, would all be good choices.

Some time ago, Jarred at Upscale Audio mentioned to me a demo he set up using 1st generation PL Dialogue with ML and how impressed he was with the performance of the PL / ML combo.  You may find his advice helpful. Upscale sales both PL and ML.
Personally I like the idea of the Dialogue Premium Pre-amp and Dialogue Premium HP amp, and may very well consider the PL / ML someday.
I own / owned the PL Prologue P3 and P5 (stored), and P7 Mono pair (sold) and I still use the PL P8 CDP with my current Merlin TSM /Ars Sonus Filarmonia combo. There's better and worst, but for the dollar it exceeds most.

Many ML speakers have a very low impedance at high frequencies. You might find a set of ZEROs helpful in dealing with the load. I would try the amp 'with' and 'without'.

www.zeroimpedance.com

Thank you all for your super input. I've got plenty to think about.