"Big Maggie and ML CLX comes close except that they lack a bit of weight and growl that a good size grand piano possesses. "
This is one reason I went with OHM Walsh speakers from Magnepans and having auditioned both ML and Magnepan . The sound has similarities to electrostat or planars but the Walsh driver is dynamic. Pianos, drums, etc. sound more like real drums. Plus the single Walsh driver covers everything up to 7-8 khz or so no driver integration issues with dynamic woofers or subs. The top end uses a more traditional soft dome tweeter.
This is one reason I went with OHM Walsh speakers from Magnepans and having auditioned both ML and Magnepan . The sound has similarities to electrostat or planars but the Walsh driver is dynamic. Pianos, drums, etc. sound more like real drums. Plus the single Walsh driver covers everything up to 7-8 khz or so no driver integration issues with dynamic woofers or subs. The top end uses a more traditional soft dome tweeter.