Thanks for the replies. This forum never lets me down when it comes to audio info. I will definitely take Alan's advice -- and it is in my nature to experiment so I will check out different configutations and listen for any differences. Are there any good musical pieces for imaging or coloration?

AV equipment (in case you care)Panasonic TH-50PE700U,PS3 80GB,HK 445,Axiom M60,QS4,VP100,Hsu VTF2.3