I just replaced my 2200 with a 3800 about a month ago. It was a fantastic upgrade, and the results are wonderful. I expect to be happy with it for several years, even if a replacement for the 3800 does appear.
If you do go the 3800 route, be sure to study carefully Eric Chan's wonderful notes and FAQs about the 3800. His suggested workflows, for color and for black-and-white, while a bit counter-intuitive (at least to me), work flawlessly. And his profiles for Advanced Black and White are right on.
Eric's notes are here.
There are also several good threads about the 3800 on the forum. A search fro Epson 3800 should bring them up.
This doesn't directly answer your question, but I hope it helps.