I am converting a 22' x 18' room into a home theater and want to know if I need a 5 channel amp with a super high power rating. Rooms pretty big. Being a guy I would love to have 150+ watts per channel but can't justify to myself spending over 700-800 on surround amplification. I was looking at the parasound 855 with 5 x 85 but don't know if this will do. Can anyone give comments if this will be enough? Remember, this is just for surrounds. Thanks everyone.