If there is one component I still kick myself in the ass for selling, it was my 5350SE. Sure my Ayre V5's are a little better, but the Creek was just the most fun and useful audio component I think I've ever had. In all fairness to your NAD, it probably does need some time to break in. Also, with a new amp, its possible you may have to move your speakers a little to compensate for differences there are between the 2 amps and how they effecr your speakers.