I heard the Salk M7 just over a week ago at Warpdrv's house and fell in love all over again with another Salk product. They aren't a small monitor by any means, and they throw a gigantic sound stage, with the best depth I've heard from a speaker anywhere near that price range. The RAAL ribbon is superb, offering amazing clarity and extension without any glare. But the mids are where it's at with these monitors, and they produce in spades. You get all that midrange warm but without a loss if detail; everything is so clear and life-like, IMO, and the tonal balance/timbre accuracy is amazing. Oh, and I couldn't believe how well they filled Warp's gigantic room!
With that said, you should really hear all three before you buy (if possible). Otherwise go with your gut, as I'm sure any of the three will be awesome.
How big is your room and what is your system comprised of. Do you have room treatments?