I am looking for some help. I am putting in a new home theater, not dedicated. Will probably listen to classic rock as well. The room is 13x16, all drywall. The speakers I am considering are polk audio RTi8 for front right and left, CSi5 for center, and RTi6 for the 4 surrounds. Does this sound like it would work for the room? Will I need a sub with these? Any speakers that would do a better job for around the same $1200? Thanks, for the help.