I'm building a house and have been researching this stuff for months now since I'm going to buy the whole shabang...tv, receiver, all speakers. I was also dead set on the studio 20s for a while after listening to them and PSB, KEFs, but then I went to listen to the B&W 635s and I think their soundstage is just as good if not slightly better...to me. Plus, I can get a pair for $540 instead of $900 for the Studio 20s.
I'm thinking of the B&W 635, it's matching center, SVS PD10 nsd, Paradigm ADP and either the onkyo 805, 875, or Denon 2808, 3808.