Hello Mark,
I couldn't print an 8"x10" black & white on my personal 4900 using Epson's own Exhibition Fiber Paper, without seeing 6" of pizza wheel marks, albeit very-very slight marks, frustrating non the less. Epson tech, after much back and forth, suggested I not use that paper, and this was "simply, due to the design of the transport mechanism."
I wonder what a test of printing black only (a completely black page) would reveal reference the new printers transport mechanism, namely pizza wheel marks?
The other annoyance, living in a low humidity climate, head blockages. I cycled the printer every two days, outputting the little head check test pattern, all was fine. But, as someone who only outputted with photo black, this left the matt black ink to fester, so without doing an ink swap, I couldn't perform proper maintenance. When I eventually switched the printer to Matt black, this eventually killed the printer head, blocking it beyond repair.
These are the two reasons keeping me away from this new Epson printer, and looking to Canon's 17" model. From what I can gather, the Canon runs ALL inks on a maintenance cycle, both blacks. The Canon has a proper vacuum paper advance, with no mechanical "pizza wheel" contact on the prints surface.
Have Epson addressed these two issues with the P5000?
Cheers,
Chris