I went with the m5 for surrounds because I wanted to added lower frequency response for explosions and other sounds when watching movies. I know it's not a perfect comparison since the qs8s were v2 and the qs10s are v4s but there is a massive improvement in clarity of the lower frequencies with having the dedicated hp woofer on the qs10s for surrounds. Looks like my one M5 caught up to the other this morning and both are supposed to be delivered later today. I'll get to test drive them this weekend.
