u/PB_41

Trying to build a great sounding system for a 12 X 12 X 12 room.
Considering an NAD M33v2 running Harbeth P3 ESR,
The NAD has lots of power and an integrated streamer. Also built in Dirac room calibration.
Does the calibration make a difference?
Thoughts / advice?
Room is somewhat isolated from the rest of the house.
Prefer to buy used if possible. Appears to be sort of expensive but yolo!