Hello!
Wow, two totally different speaker types, both excellent.
You said media room, I'm assuming you are using the same system for music and video? If so, I would highly recommend the B&Ws - the MLs are great, but IMHO they lack the dynamics and slam to pull off a realistic movie experience, especially if you like to listen at higher sound levels, which the MLs won't do without strain. The B&Ws image like crazy too, so you don't lose much over the MLs, but gain dynamics. YMMV, of course!