Surprised no one's mentioned THE (well) under 10k bookshelf that has it all - transparency & bass plus higher efficiency, then all competitors - the B&W 805D3. Less than half the price of the TAD ME-1 & quantifiably better in some respects.
https://www.theabsolutesound.com/articles/bw-805-d3/
https://www.stereophile.com/content/bowers-wilkins-805-d3-loudspeaker
The continuum mid is better then the driver it replaces & that one was better than the one in current kevlar drivers in the current floor standing 800 series range. Musical as all get out too. Can't beat a great diamond tweeter, on top of all its other virtues. See for yourself,
https://www.theabsolutesound.com/articles/bw-805-d3/
https://www.stereophile.com/content/bowers-wilkins-805-d3-loudspeaker
The continuum mid is better then the driver it replaces & that one was better than the one in current kevlar drivers in the current floor standing 800 series range. Musical as all get out too. Can't beat a great diamond tweeter, on top of all its other virtues. See for yourself,