The right choice of amplifier will certainly deliver what the OP is seeking. Most electrostats and planars, including the ML 11A, have very low impedance in the high frequencies. When an amplifier is not powerful enough to control the speakers, the first thing that goes is detail and clarity. On the flip side, the bass is usually very high impedance, so less capable amplifiers will make the speaker sound muffled or boomy.
There is good advice above from steakster on the Voltage vs Power paradigm. But more than anything, you’ll want an amplifier that is stable down to 2 Ohm so that it can handle the wilder than typical impedance curves of the ML 11A.
Class D amps could be a good direction to go performance-wise, but tonal balance may be a shocking difference coming from the OP’s CJ amp. The digital chain is also on the leaner/cleaner side, so most Class D may not be the perfect fit. Class A / AB amps may be a better fit. McIntosh has long been a good partner to Martin Logan. There are many other great options from other manufacturers as well. If space isn’t an issue, I would consider the Cambridge EDGE M monoblocks. They have a wonderfully natural tone, deliver great detail at low volumes, and can drive tougher loads like the ML 11A without breaking a sweat. I am an authorized Cambridge Audio dealer and am smitten for their EDGE line of electronics. In the right setting, the EDGE product line can be endgame.
