Well, I've had my new NAD T-955 for a couple of weeks now so I thought I'd go ahead and post my impressions. This will be pretty short and very non-technical.
I'd been running an XPA-5 in my HT for the past few years and decided to sell it and give something else a listen. I ended up with the NAD mainly due to the combination of price/new. It seemed to be priced in line with comparable used amps.
My first impression was not too good as I turned it on to find five blue lights shining from the front of the NAD...with no way to turn them off. The Emo had the same blue lights, but at least there was a switch to turn them off.
I find the sound very comparable to the Emo with my LSi setup. I think the bass is a little tighter, but nothing else stands out. I just don't hear any significant sonic differences one way or the other. My DSOTM blu-ray sounds fantastic with either amp in the system
The NAD runs very hot. It is hot to the touch and really helps my PJ heat of my modest little HT.
This experience cost me about $225, but I figure part of that price is hearing two different amps in my HT. The other benefit for me is having a new amp. The downside is of course spending $225 for little/no improvement...and retaining the annoying blue lights