I have the iP5000, which I believe is the world's first 1 pl dot ink
jet printer. It's capable of 9600 dpi resolution which produces
visibly grander photos, something the iP4000 (really a reworked i860)
with its 2 pl dots can't match up close. I also have the i860 and know
this. Of course, looking at the photos from a distance they would
appear "identical". How fussy are you?
. But looking close you see
a sharper, more detailed image. More focussed (because of the smaller
dots). This is really noticeable in graphics too. I was quite amazed
as I do a lot of printing at the highest resolution. Epson's Glossy
Photo Paper and Costco's Kirkland Professional Glossy Photo Paper work
beautifully.
I don't know the Epson R300 at all as I left the Epson organization" a
few years ago. I prefer the Canon line of printers and their user
friendly cartridge system, unlike Epson's electronic chip ones. If you
refill, or buy 3rd party cartridges, you're better off with the Canon
line. I run my iP5000 with 3rd party cartridges made in China/filled
with US Formulabs ink. One bonus the Epson R300 printer has (I believe
it has?...) is the capability of printing on special CDRs. The Canons
in North America have this capability removed - copyright reasons.
-Taliesyn