Upload & Sell: On
Okay. I think that metallic inks might be a clogging nightmare, and not the Appalachian style. Yeah, gold metallic ink would be cool and while there are high end proofing systems for prepress that can do those, I doubt we're going to see them on inkjets anytime soon. There are some models of printers that already include a gloss clear coat, so I guess a matte one would be possible as well. Every additional ink channel adds cost and complexity, so expect significant added expense. For my money, I can just spray away with Print Shield and be happy. Most spot, mixed and corporate colors are already achievable with today's large gamut ink sets and as long as you've got good custom profiles, it's not hard to hit those.
While I haven't used the printer driver for the 4880, with every other Epson I've own it's never been a problem to spec whatever custom roll or paper size you wanted. Just go to the "Manage Paper Sizes" tab and type away.
Skewing. That used to be a problem, but I haven't seen it in a long time - years in fact, but I am using one of their higher end printers. I think the new series - x9xx etc. are much better than the previous generation. Maybe that alone would be a worthy upgrade.