Quad Electrostatics have low listener fatigue and excel at giving lots of details at low levels. The 988 is out of your price range and the 57 may be too difficult to accomodate.
But there seems to be a decent selection of 63s in the 1500-2000 range and that should be an ideal speaker for you. A decent tube amp or something like a Pass Aleph should get you what you want.
But there seems to be a decent selection of 63s in the 1500-2000 range and that should be an ideal speaker for you. A decent tube amp or something like a Pass Aleph should get you what you want.