Thanks guys, I just tried a Harmon Kardon dpr 2005 and had the crackling sound that heavystarch mentioned , but only in the right front speaker.
It also has a ohm setting for 4-6-8 ohms and when I tried toggling through these via on screen graphics, I got a loud buzzing noise, also through the right front only.
I sent the 2005 back and read two positive reveiws of it at AVS and then, one poster who raved about it, had crackling through his right front and now another poster has the loud buzzing in his right front.
I Actually like the Pany 45 more than my most likely defective dpr 2005.
I hate it when manufactuers use us for QC .