I think the Dunlavy is a tremendous speaker, but it can be a difficult one to setup in a typical room. It needs to be widely spaced (along the long wall). Setup this way it has a narrow sweet spot. The Vandersteen is also a great speaker. It's also somewhat easier than the Dunlavy to setup and get great real room results. A well setup system in a good room using $3,000 to $4,000 will frequently sound better than systems using any of the speakers you're considering. I don't think you can go wrong with any of the speakers you mention, but it will take dedication on your part to maximize their performance.
Montana EPS or Dunlavy 4A's?
Am about to make a major investment in speakers and I hink i've narrowed it down to these 2. I've heard the 4A's (which were very good) but have not heard the Montana's. If anyone has heard both of these please contact me and give me your thoughts. Other speakers that have intrigued me are the Hales Trancendance 8, Eggeleston Andras, Waveform (model #?), and Vandersteen 5's. Again, any feedback you could impart on these would be greatly appreciated. Thanks