Comparison auditioning - buy 2-3 products representative of various designs and compare them at the same time - is more effective IMHO.
The only "break" that I take is to wait a week or two and come back to it with fresh ears and see if it sounds the same as before. If there is a question of break in affecting sound, I will use that time to run in the components.
can you wait at least a month to listen to enough music to adjust your ears to what the new thing brings to the system on its own?
That is something else. While hearing differences can be done quickly, changing preferences takes longer. For example, if you only listen to tubes, your first listen to class D may be negative.