Play them 85 ish db or higher with a breakin playlist or pink noise overnight if you are in the situation to do that. Can even throw a blanket over them if you need to lessen the sound. In the morning they will be 90% of the way there. Probably still break in slightly after that but you wil get a real feel for what they are.
I would definitely listen to the Contours before you buy them. They are in my experience with the Contour 20s not real dynamic. Snare drums didn’t hit me hard. My older Focus 140s were more dynamic than the Contour 20s. Couldn’t really get on with them.

