Contrary to the above, I find B&Ws to be upfront and dynamic, certainly not laid back. They are great with rock material and sound best with warm electronics due to the metal-dome tweeter. On the other hand, I find the Sonus Faber Grand Piano to be laidback and excels in jazz and vocals. B&Ws do rock music and HT better than Sonus Fabers. Both are colored speakers that have a distinctive house sound of their own. I have owned the B&W N805 and SF Grand Piano, the latter for 3 years.
Since you have listened to the Grand Pianos yourself and liked it, it's a wiser choice to go with that speaker rather than taking a chance without listening to the other two speakers.