Buying Bookshelves, I love B&W but....

my experience is that the mids are a bit compressed, less open and detailed. I really like the imaging, highs, lows, fullness, stage pres etc. As well as design and build. Is this a common problem in bookshelves, obvious size limitations? Seems to be an issue with the old S3 series, new 600 and CM1. Should I demo floor standing models or consider 700 or 800 series bookshelves? Or is this simply one of the characteristics of B&W?
Demo'd with Rotel, NAD, MacIntsosh integrateds.