You should have no problem with this mixture. Your only issue could be the change of tonal quality when a voice "moves" from one speaker to another. This can make things harder to follow.

In terms of music, quality listening will not require the center. The Arcam is a solid midfi piece, and the B&W's are also of good quality, albeit getting along in years. The weak link would be the JBL's in the HT area.

But hey, your main thinking is music correct?

Regards,

BBIBH