when i setup my new Marantz SR5005 in a few days (used as a pre-pro), i'm wondering what will be the best starting point at aiming my 2 surround speakers.
the surround system will be a Hafler DH500 amp and a pair of Energy 22 Ref speakers.

should they be looking at each other, or should they be facing the back wall (for a more diffused sound field)?

as they are large "bookshelf" speakers, i must put them on their stands on the floor (not up on the walls), and they'll be at about 110 degrees from my head position.