A bigger question might involve whether the dedicated stereo analog out is of great value to you, because the 103 doesn't have it.
That said, the features that the 103 has, which the 83 doesn't have, should be given more weight in this decision than the relative analog audio sound quality. They will be very similar, the 83SE and the 103, in that regard. So its really the other features that should drive your decision. the list of things the 103 can do which the 83 cannot is fairly substantial, but if none of them are important to you then the upgrade might make more sense.