I just deleted a very long post. Be thankful! :-)
FWIW Your goal was my goal, non-fatiguing but very articulate speakers. I found them about 5 years ago. Silverline Boleros. They sound NOTHING like the other full range Silverline speakers which IMHO were voiced for typical audiophiles, i.e. dynamic, articulate, and forward. Especially the Silverline Sonata III which I heard at Silverlines store in the Bay area when I auditioned the Boleros.
What drew me to the Boleros was the selection of the drivers (which other speakers I have used) including the Esotar tweeter. The impedence curve and sensitivity which made them an excellent potential for driving with tubes. Also the speakers drivers are spaced closely together which makes semi nearfield listening possible. I use them in a 13x19x9 room in a classical equallateral triangle and find them both easy to drive, easy to listen to, articulate as hell, and they fully explore the potential for three dimensional soundstage (as one could expect in a room that size). And they are really beautiful speakers. Women visitors love the appearance/size/finish. So do I.
I know the pirce is a bit more than your target, but personal contact with Alan and optimally a listening session might result in some serious price accomodation. BTW, there are several excellent on-line reviews if you are interested.