The NAD M3 should work well with the Contour 5.4. The other integrated to consider is the Musical Fidelity A5.5. Musical Fidelity has always paired very well with Dynaudio. The Dynaudio 5.4 typically works best with MINIMUM of 200 watts into 8 ohms.
Dealer disclaimer applies (but I also do all 3 lines mentioned in your post).
Dealer disclaimer applies (but I also do all 3 lines mentioned in your post).