I recently purchased the new Onkyo 6.1 speaker system to use with my Yamaha HTR-5560. My Yamaha, is 6.1, but unfortunately lacks DTS-ES discrete processing. It will, however, do DTS-ES matrix. I am just wondering, would I notice a big difference on DTS-ES discrete capable dvds if I upgraded my receiver? I mean, movies such as Gladiator, Blade II, LOTR EE, and Austin Powers: Goldmember sound fantastic with the DTS-ES matrix but I wonder how much better they would sound if my back channel were discrete and not matrixed. Maybe someone could comment on this. By the way, I have been very happy with my Yamaha.