For our downstairs living room, wife did not want any in-wall or visible speakers including a sub. The compromise ended up being five 8" Episode 1500 in-ceiling and no sub. On the Elite AVR this is setup as 5.1 with sub changed to no. When this is done, the fronts change to large (mandated when no sub is selected), center to small and surround to small with crossover at 80Hz. With these speakers rated as 38 Hz - 20 kHz, is this the best way to handle this or should I drop the cross over to 50Hz from the 80Hz since this is the only lower option on the Elite? Thanks.