I am considering using a pair of LSi9's as the mains in a 7.2 set up, where I would move my 25's to the sides (a bit to the front of the room). I would keep the LFE lines in on the 25's but hook the top section up as surrounds. I also have an LSiC for center, and a pair of LSi7's for rear channels. the only thing that would run off the receiver for power would be the 7's.
your thoughts are valued and appreciated