In terms of being "forgiving" of acoustic environment and placement, you want speakers that have the best off-axis frequency response. In this case, it is unequivocally the Salon2. The B&W has one of the worst off-axis frequency response and you really need a good room and placement for them.
I used to own the B&W 802D2. My room was pretty good, so they sounded pretty good. But I've heard 800D & 802D in rooms that were not so great, and the B&W didn't sound so great either.
And the Legacy Whisper didn't measure all that well. John Atkinson wrote: "I'm afraid that, without my being able to perform any quasi-anechoic measurements, the Legacy Audio Whisper's measured performance raises more questions than answers
Translation: the Legacy Whisper had bad measurements.
So the lesson is, if you can audition speakers in your room, then don't worry so much about measurements. But if you have suboptimal room acoustics and placement and you can't audition them in your own room, then it is safer to get speakers that have great on-axis and especially horizontal off-axis measurements. In this case, it is unequivocally the Salon2. Your other option would be the KEF 207/2.
Looking at that room, though, I don't think you should spend $9K on speakers. If you have a RBH dealer near you, try to audition the RBH SX-8300/R Reference towers (new MSRP $5900, street price around $4K new). They may not have the best aesthetics or the mystical Diamond or Beryllium tweeters, but they have a great sound that I think rival these speakers.