I think I am about to do a major HT redesign That's dangerous. Currently, I have a pair of (all Definitive Technology speakers) BP8B's as front channels, ProSub 100s for each speaker, a C1 as a center, and a pair of BP2X's as rear speakers (they are actually on each side of my sofa) and a PF-15 subwoofer, all powered by a Yamaha 995 receiver. I intend to add to the mix a pair of BP6B's as side speakers, and use the BP2X's as rear speakers. I don't have the slightest idea on how to proceed. I've heard a lot of side / rear speakers, yet I don't know how to do it. So I'll try to make a couple of specific questions. 1. Do I definitely need a DTS-ES / DD-EX surround processor? 2. If not, can I get away with my current receiver by connecting in series the rear / side left & rear / side right speaker (so that impedance doesn't drop below 4 ohms?). 3. Should I get another Dolby Pro-Logic decoder, run the rear outputs to a set of inputs of the decoder and run the side / rear speakers in Dolby 3 mode? 4. Is it possible at all to do what I intend to do? Do you think it'll sound better than my current setup? 5. Any other tips? Thanks a lot for your help! Javier.