I am very demanding when it comes to print quality. I have been pleased with the relatively low level of metamerism from the inks used in this printer. While I do use ImagePrint 6.0 as my RIP (instead of the Epson print driver), the output is top notch.
I do not want people to see the process I use to create my art, but rather, I want them to experience the art. The output from this printer does exactly that. Great paper handling and front-panel control.
The only output drawback is the whitest areas of an image, where the printer lays down no ink, reflect differently than areas where ink has been laied down when using glossy and semi-gloss paper. You need to look at the paper at an oblique angle with a fairly concentrated light source to see this, but it is there. The new 4800 is supposed to solve this, but forces the user to swap inks between matte and photo black. (The new 4800 only flushes the black line, but am I supposed to be happy about 'only' wasting one colour of ink? Sorry, Epson. I'll stick with the 4000 for now.)
If you're looking for no-excuses, top-quality output, be sure to give this printer a long, hard look.