Brumating is a good idea when breeding reptiles that naturally brumate... there is a good chance it helps with fertility/sperm production. Brumation really isn't hard, you just gotta reduce the photoperiod to 10 hours or so a day, lower the temps some, and most beardies will lay around all winter. Not all though, some beardies don't seem to want to brumate.
My dragon brumated his first winter as an adult, not eating crickets for about 3 months, but this winter he didn't really brumate like last year. He slowed down though. The moral of the story, brumating your dragon really can't hurt, just provide the right conditions and see if your dragon wants to brumate or not. Offer them some food from time to time to test their appetite.