None of the SVS demos I've been to has made me even consider using a SVS sub for music. Of the two I would take the B&W, but I myself chose a Velodyne DD-12.

HD621, G98DH, G68ADV, Bc Acoustiqe ACT A3, 5200C DSP33, NuForce Reference 9 monoblocks, 2x SB3's, Velodyne DD-15 & DD-12 Subwoofers and a Meridian sub.