Does anyone have any impressions of Montana Spkrs?

Sure..as an unbiased observer/listener, and owner of much high end over the years, I think they sound fantastic! They sound like a Thiel and a Dunlavy combined really. They're clear, dynamic, detailed, coherent, etc. I actually had the pleasure of visiting the plant, talking with the designer, and evaluating the big top end speakers at the reps house. Very nice!
Good luck

Great drivers, excellent enclosures, and very dynamic. Your description of a combination between a Dunlavy and Thiel is pretty accurate in my opinion. If there is one thing that I can critisize about Montana, its that they don't sweat the details on their crossover voicing (some are even outsourced designs!). I think this is the only area which keeps Montana from being at the very top of this kind of speaker offering (Large WMTMW configuration).

If you want to consider an alternative to the Montana, take a look at the AV Reality LuxAR speakers at http://www.acoustic-reality.com/portal.asp .

The LuxAR speakers have extremely exotic drivers (that no other manufacturer that I know of uses because of their cost). The drivers themselves have edge of the art impulse responses and are cost no object designs. These speakers also have a killer sounding crossovers and are WAAAAAAY underpriced as compared to Montanas (or Dunlavy, Thiel, Dynaudio, etc.). You can get them with the newest form of digital amplification that will be re-defining what we can expect from amplifiers too!(This amp will be taking the audiophile world by storm from what I have been hearing from others who have heard it).

Personally I think this is one of the greatest speakers currently offered at any price, even though it is a fraction of what Montanas or the big Dynaudios cost. I even believe that they will crush the super expensive Wilsons and Pipedreams too!

I heard a pair of Montana XPs over the weekend for the first time. They work hooked to a Bryston 4B, ARC transport, Perp Tech P-1a/3a and a preamp I can't recall. I was listening to modern jazz and overall the sound was big and flowing, but not as big as I would have expected. Soundstage was focused and acceptably deep, but not as wide as I would have liked. Also, there was a bit of grain that made it a bit difficult to listen to during spirited passages, but overall the music was enjoyable. I list all the components because this was my first exposure to Montana speakers and I don't know which piece[s] I'd attribute the graininess to. Physically very big too.