Hi Loki.
Several years back, I put together a 5.1 system for my ex-wife: 603s up front and 601s in the rear. They were driven by a Yamaha 100w x 5 avr. This was in a room a little smaller than yours. The B&Ws are excelent. Problem is, I don't think there is a matching center channel speaker. I used a large Polk center which does okay w/ the 603s.
For a receiver, you might look for a used Onkyo 605 or, much better, an 805.
Mike
Several years back, I put together a 5.1 system for my ex-wife: 603s up front and 601s in the rear. They were driven by a Yamaha 100w x 5 avr. This was in a room a little smaller than yours. The B&Ws are excelent. Problem is, I don't think there is a matching center channel speaker. I used a large Polk center which does okay w/ the 603s.
For a receiver, you might look for a used Onkyo 605 or, much better, an 805.
Mike