arcam a38 vs nad m3

I have the m3 since 6 month and i want to change it for arcam (a38, or c31 pramp whit p38 poweramp). I don`t like the poor dynamic of the nad but i like the sweet treble and for my speaker its essential. Does arcam its a good choice for me and In general does the sound of arcam top of the line is better than the m3???
Heard that the sound produced by the Arcam is laid back...and very natural sounding. Definitely not fatiguing.
Arcam makes a terrific product. Very understated--my favorite amp in my early audiophile days was the legendary A-60. Since I owned a receiver--the family 'sound' was in tact, unchanged after all these years, except for improved resolution.
Go for it.