Is your unit a belt drive? I was just thinking that the pulley on the door end could be binding as well.
It has to be a point of contact and you said the rollers were good so other points would be the arm connecting the door to the track arm between the opener and the wall, the opener pulleys...
Have you checked the track bar from the opener to the wall above the door to ensure that the bolts are tight and not binding? My only other thought is to check to make sure the brackets holding your garage door panels together are tight and the panels are not binding on each other.
Sent from my...