I'm using the strapped mono option @200 watts x1 into 8ohm. The sound is amazing. But I am also impressed at how similar the amps operate. I don't have service history for either and they behave exactly the same (protection kicks in at exactly the same time, LED output is identical across...
I finally secured a 2nd Sanyo+ P55 amp last week. Traded a fellow for an integrated that he is very happy with so win - win. 2 sound even more glorious than one.