I have B&W 805 D2 speakers. Generally, you want high current large power supply amplifiers for this speaker. In your choices, I would go Parasound Halo Integrated because it has the largest transformer and power supply.
I would look at the audioaficionado forums for B&W. They have a specific subforum for B&W only. AVS is just painful to read nowadays due to all the paid advertisements (pages are slow to load and can lock up Internet Explorer from all the gunk in the pages).