I'm looking to upgrade to a 5.2.2 or 7.2.2 system, from a 2 channel audio system, if possible. I have a Denon 4700 rec and a pair of Rf7-III speakers, but want to turn this into a home theater type set up, if possible. The room is challenging to me.....It is a 13 wide by 23 deep living room (full of furniture and hardwood flooring). The listening position, where the couch is, is about 17ft back from tv, due to there being a large fireplace that sticks out in the middle of the room. There is about 3'6" on each side of the couch, to the side walls (one of which has a window) and about 5+/- ft from back of couch to rear wall. Would a 7.2 or 5.2 system work best with this amount of room and where would be a good surround placement? Would you use a bookshelf or the Atmos type height speakers for surrounds, due to obstacles? Thank you much. Brad