What is a good amp for my ML Aerius I's.

I am currently using a Aragon 4004 Mk11(which I like). Would any of these amps: Marsh A400, Aragon 8008, or the Innersound ESL be a significant improvement over what I already have. I will consider other options that do not break the bank. I am particularly interested if the Marsh excels or starts to fall down when presented low impedances presented by ESL's. I would greatly appreciate responses from people with experience with electrostats, as I am aware some otherwise good amps may not fair well with ESL's.
FYI my pre-amp is a CJ PFR.

Thanks in advance for responding,
Bryan