Skyfish:

The difference in hiss with the new 950 will be way more dramatic as the volume control is lowered, than on the old one. My only concern with calibrating lower than "00" would be inter-channel volume non-linearities in the volume control circuit as the volume is reduced too much. This may or may not be an issue however in the real world.

I think you will be a very happy camper with the new unit - the hiss will be _that_ much lower