To add to Duke's comments, consider whether your room can support speaker output down to 20hz or keep the extra hz's under control. A speaker that rolls at 32hz can be a blessing in a lot of rooms. FWIW. :-)
P.S. It just dawns on me to ask - Are you sure that the sound you are looking for is not the absolute bottom but an increase in what I would call the power zone, i.e. 200 to 500 hz +/-. I have found that missing in some panels or electrostats. As You say great highs and mids, but the 'bass' lacked richness.
P.S. It just dawns on me to ask - Are you sure that the sound you are looking for is not the absolute bottom but an increase in what I would call the power zone, i.e. 200 to 500 hz +/-. I have found that missing in some panels or electrostats. As You say great highs and mids, but the 'bass' lacked richness.