I've been printing on a 3800 for over 3 years now, great printer. At first 13x19 was about as big usually printed, every once in while I'd go 17 wide.
Now that I've started making multiple row pano's using a pano head, I've been printing 16x24 on 17x24 cut sheets. Matted and framed 24x32 they looked great, but now there not big enough, I now want to print even larger.
Printing a 50 image pano 16x24 wastes a lot of info, with out resampling I could go 40 inches in the long dimension, I see a 7900 in my future, wait, that isn't big enough, make that a 9900.
Even if you don't think I'll ever print 17 wide, if you could, at some point you will, and your going to like it.