I use both 2.0 and 4.1 (cut out the center). In 4.1 I use various surround modes because which works best for me depends on the recording but most often Dolby Pro Logic ll sounds best.

3M80 2M22 6QS8 2M2 1EP500 Sony BDP-S590 Panny-7000 Onkyo-3007 Carada-134 Xbox Buttkicker AS-EQ1