I just placed an order for an Onkyo TX-NR717 7.2. Fronts will be the Polk Audio TSi300 3.1 towers with the CS10 center speaker and the small sub (I think it is PSW110). The satellites will be the M10s. For rears I am going to use a small pair of Klipsch that I was using for satellites. This will all be replacing an old Sony HTiB 6600. I was using a set of 5 small Klipsch speakers that actually came from a 5.1 surround system I used as a computer system, and the original Sony sub. Did I make any big mistakes and will it be worth sleeping on the couch? My living room is about 22' by 12' and fairly symmetrical.