I would opt for the B&W so I could keep the sonic characteristics all the same. Mixing brands isnt going to allow all the speakers to blend. The same tweeter thru out the ht system is essential to getting the best integration.
Von Schweikert LCR-15 or B&W HTM2
I have B&W 804's in the front and von schweikert VR-1's in back , trying to decide between the HTM and the LCR. Obviously the HTM is the match however I can get the LCR for a better deal, thoughts?