I have not heard the Harbeths, so I can make no judgement on them.
However, I have heard the Tetra speakers, and they do sound incredible, especially for the size and price.
Another thought is the small Sonus Faber speakers (I can not remember the model) sound very musical, virtually disappearing from the sound stage. I bit colored, but in a good way.)
The Revel M20s might also be a good choice. Very accurate, great soundstaging, but not the deepest of bass obviously.
Good Luck in your search.
However, I have heard the Tetra speakers, and they do sound incredible, especially for the size and price.
Another thought is the small Sonus Faber speakers (I can not remember the model) sound very musical, virtually disappearing from the sound stage. I bit colored, but in a good way.)
The Revel M20s might also be a good choice. Very accurate, great soundstaging, but not the deepest of bass obviously.
Good Luck in your search.