@curiousjim mentioned Acoustat. For years I used a pair of Hafler DH-220s running in bridged mode to power them and the RH Labs sub I have. This provided about 440wpc. Then a few years ago someone pointed out to me that electrostatics aren't exactly stable impedance and that the bridged mode was not an optimal set up. It was a simple enough experiment to change things by flipping the bridging switch and moving the speaker cables to a single channel on each amp.
The difference in sound was astounding even though I was only providing 100wpc to the speakers! The detail and depth was greatly improved and the bass was still authoritative. I was amazed. (And my butt was sore from kicking myself for wasting all those years! 🙄)
The point I'm attempting to illustrate is that power is only one factor to consider. Compatibility and quality should also be carefully considered in your choice of amplification. BTW, I wound up with an ARC VS-110 which is about 110wpc and I'm happy as a clam. While it doesn't go to the subterranean depths of the solid state Haflers, it does everything else very, very well.
Hope these thoughts help your hunt.
Happy listening...