Ichigo, as I've often pointed out, the sound that we hear at a concert doesn't come only from the front, but at least as much comes from surround ambience from other directions. The mikes picked this up but it had to be mixed into the front channels in 2-channel sources(there was no place else to put it). Surround processing such as DPLII detects the phase differences in this surround material, extracts it from the front channels, and sends it to the surrounds where it belongs, making the home listening experience a bit more realistic. I'd never restrict myself to listening to 2-channel materials on only the front speakers when a surround setup was available to me.
Relax; your setup hasn't even been completed yet, and you'll enjoy it more and more as you slowly learn more about what it can do.
