I'm facing a problem; i just can't decide whether i buy a pair of BL5 or BL9 1.º - BL5 are full digital and BL9 aren't 2.º - The capacity of room adaptation is a must The main purpose is to have a 5.1 system, and then who knows a 7.1. Should i buy 2 pairs of BL5 or 1 pair of BL5...