Do note, the differences were small, but clear to me and more so to my wife. She has very sensitive hearing.Neither my D30Pro nor my NAD C298 power amp got better, nor gained or lost "edges." So I guess you're lucky.
So, how do you like the NAD? It's on my short list along with March if I go class D. If AB, it is Atoll for "flavor" or Vidar and Benchmark for clean.