I have the same pair here, they are incredible. I put two velodyne 12 subs next to them, and I even put a 18" sub in the middle too. I high pass/eq the B&W's with a meyer cp-10. The whole rig sounds unreal. They sound soo good, but are a bit tiring on the ears, so having some other speakers just for basic monitoring is a good idea sometimes.
They suck up the power so a strong amp is good. I actually just use a crown amp and I over shot the power size so I keep the Crown amp very neutral. It sounds very good and although not some bryston boutique amp- it gets the job done with no added sweetness.
Dont do what I did and get so into them you stop working on other stuff.
I blew a tweeter and it was only $130 from B&W to re-skin it and they did it in a weeks time!! It was cool!!
here is a pic from the EMI console for sale on Vintage king, it was from the wall mixing session in france!!!