As for the LFR180, I am sure you know you'll need two amp channels. I think you'll also need it to be at least 6" away from the wall and not in a cabinet.
Is it the rear QS8s you want to replace with M5s?
Yes, it would be the rear surround channels. At most, they would be about 5' behind the seating, unless I figure out a different way to arrange. That's one reason I may just not worry about rear channels for a while.
Right now I have a spare amp channel on my ADA1000-4. I'm using two channels for QS8s and one channel for my VP180. Currently, my VP180 is almost 8" away from the wall, and on a bench, so I think I should be fine. It's about 8' away from the main listening position, so I'm not sure how much closer I'd want it to be, but it would be worth playing with the distance from the wall a little, I bet.
