No, I think we hit the limit on what can be done with DVD several years ago. You can't expect continual improvement for 720x480i sources. All the later OPPO players seem "about as good" or "good enough" to me, with the 983H/BDP-83 as personal favorites.
The wildcard on the -103D is Darbee processing, which is a subtle effect when used properly but which has many fans. I had to take my ABT players out of the cabinet just for lack of space, and I am content with the DVD performance I am getting. (Although: I tend to be more of an "accepting" rather than a "demanding" viewer).