There was a nice review of HPs latest A3 Photo printer in one of the rags over last week or two. If I remember correctly,It also mentioned a continuous ink supply, feeding from bottles for each, of the I think, nine cartridges. ! litre of each colour, was £814 so for a figure well the wrong side of £6,000 you could forget about running out for a while.
I still think that the driver for increased quality, is simply increased ink use. Ludicrous. I only use Epson ink for the advertised longevity, though I think that a good compatible will last as long. However, if anything starts to fade, I rather fancy my chances of making a complaint to Epson Customer Services. For my own use, I go compatible every time. (Epson R800 £15/set of 8 cartridges, versus around £80 from the big E themselves)
Conan