That would certainly work. I have mine hooked to a four channel Axiom ADA1500 which is excellent.
Just to give you an idea, the LFR's do benefit from a good bit of space behind them. I myself also use mine in an HT room but it is rather on the small side. I initially set them up in the same spots where I'd had a pair of M80's and found them excellent. Then I moved them forward as much as is possible and found them even more excellent.
As long as you can position your LFR's a good foot or two further from the wall from where your M80's currently are I'm sure you'll be very happy with the sonic results!
