S allen,
There certainly is something very, very special about a well built studio monitor. Several greats come to mind, in addition to the ones you mention above, none of which I've had the pleasure of hearing. People certainly seem to think highly of the Harbeths, from what I've read. I would add two more cult favorites, the Totem Tabu, which I have personally heard and thought was highly excellent, and the Totem Mani, which I have not personally heard, but have been told is even better than the Tabu, but also more finicky about its electronics. Another little known speaker is the Induction Dynamics monitor, for around 3000 dollars. Splendid speaker with a very open and smooth sound, with a unique brick wall crossover design. I heard those in Florida once. So adding those names to the list with the Tannoy Prestige Series, Shahanian Acoustics Diapason Ensemble, and the Harbeth Monitor 40, I'd say we've just made a list of some fantastic speakers! This is a fun hobby, for sure.
The speaker I settled on is the Intuitive Design Summit, which is technically a monitor also, but provides excellent bass response down to its low end rolloff around 40 hertz, images like crazy, and is both ultra smooth and ultra detailed.
Thanks for checking out my thread.
-Bill