I've also experienced some of the thinness in two-channel on the 950 (and this includes vinyl in which I proudly use a Rotel MM/MC phono stage.)
However, I recently experimented with an AC power filter (nothing fancy. Just a Tripp Lite Isobar) and discovered that I could tame that edginess without compromising the detail or the wide/deep soundstage.
In principal, I haven't believed in AC power filtering; but my ears tell me a MUCH different story.
For those who are less than thrilled with the 950's music performance, I'd recomend experimenting with power filtering. And don't just plug it in and forget it. Try combinations of the 950 and your amp in isolated outlets and filtered outlets (the options available to me on my Tripp Lite) and directly into the wall. I heard a definite difference in each combination.