There's no word yet of a 2200 replacement, but of course, it's just a matter of time. The smaller Epson R800 is out, which utilizes the new gloss optimizer. I'm currently waiting for my 4000 delivery. This will be an awesome printer. It's more money (part of the true "pro" Epson line), but you'd be able to do 16x20s. It's also considerably faster than the 2200 and 7/9/10600 printers.
The Canons may very well be cheaper, but nothing touches the 2200's output quality, except the 7/9/10600s, of course.