Mark, I feel the 3800 is substantially limited by its inability to use roll paper, which means one would be limited to 17X25" paper for an aspect ratio of 1.5:1--or print lower than c. 15.5" high. Some of my images are LOTS wider than 1:5:1. I did consider the Epson 4880, but when I found a new 5100 for $1335 delivered to me, I bought it. Of course, it's not here yet, but I've got space!
One reason I chose a 17 this time over a 24--I've had 2 Epson 24s, a 7000 and 7600UC--is the ability to get TWO matts and backs from the standard 40X30" sheets--cut to 30X20", of course. That makes framing lots less expensive.