There are a lot of M&K S150 MkIIs at Skywalker...can't say about the others...Just to add a little bit more to that last statement. Bowers has a very noble pedigree. They're the only speakers used at Abby Roads, Skywalker Ranch, and Air Studios.
I loved the B&W 801s decades ago. I haven't been as impressed with the current line, they don't seem like the same company. In fact, I don't think they are, but what company is after 30 years?They are a mature and refined sounding speaker with stunning highs that are not too aggressive and a smooth midrange. When properly paired with the right sub they blend quite well and the woofer will vanish in the room.