Glenn, I just replaced a Marantz SR-96 receiver/DP-870 with 950 about 3 months ago and I can tell you there was quite a big improvement in DD. I didn't expect much because I always thought DD was kind of a set thing and they all sounded about the same.

I am still using the receiver as my amp for the moment (it has main in's) as I couldn't swing the 755 yet but will soon.

I think you will be pleasently surprised if you decide to try the 950.

Hope this helps