Scott - with CC unhooked from 950, hiss still present, but at a very very low level. Hooked the CC back to 950 and hiss does increase. Appears both are culprits in my system.

As I said before, it does appear/sound like the hiss level in my replacement is lower than in my first unit. Its gone from my surrounds. I'll play around with the gains on my Parasound amp to see if I can lower some more. Keep you posted and thanks.