Another datapoint:

I received my 950 about two weeks ago. I have hiss that is audible at the listening position, about 10 or 12 feet away. Same hiss as described elsewhere: starts when input is analog, or when a digital source is played. I am using:

Sherbourn 5/1500A amp
Outlaw PCA cables
Polks all around.

Front speakers are RT3000Ps, which have an effiency of 92 db.

Previously used $300 Kenwood receiver, which did not hiss.