A bit OT but probably not much advantage moving from 3880 > 4900 unless you want the roll-holding capability.
If you get the 4900 get the extended warranty. Frankly, unless you are printing fine art reproductions or proofing ads where PMS colors need to be matched, I'd avoid the Epsons with orange and green. You wont see much of a difference with typical photo printing.
Well, if you go to Epson (Germany) site you can see the car for the 4900; it clearly has wheels.