I always believed you couldn't have too much clean power, but since the amp wouldn't be driving full range speakers in my HT, I opted to give the 7100 a try, figuring I could trade up if that rich uncle I don't know about kicked the bucket and left everything to me. Well the 7100 proved to be more than capable for my 7.1 setup, in a 19x13 room. Very clean and silent.
As for the 950 being obsolete, I find it does everything I need, and does it well. It may not have the latest bells and whistles or connectivity options, but it is a high quality piece of equipment, and a steal at the price.