Hi, I have 7.1 setup - Onkyo 706 AVR with Marantz 7003 KI amp for fronts with Monitor Audio BR5, BR LCR, Yamaha SW YST 216. For surrounds I have BR1 for surr rear nad 2 Mission dipol MH3 for surr back. I'm planning to add BR FX instead MH3 but what is better option: 4x BR FX for surr rear and back or to use BR1 and add 2x BR FX? In option 2 BR1 would be for surr back, right? Thanks in advance.