Upload & Sell: Off
I have several friends who own HP3100 and Epson 7800 series printers. They are happy with their results, but each printer has presented challenges and tradeoffs. With our older Epson pigment printers (4000 and 2200) clogging and ink waste was a problem for us unless we printed quite frequently; the newer Epson models presumably offer improved performance in this regard. The Canon and HP users on the newsgroups/Canon wiki/yahoo groups do not seem to be reporting clogging problems, but their models have also had less time to develop a reputation out in the marketplace.
Each printer offers slightly different paper handling for roll and sheetfeed, and they seem to vary as well in terms of ink consumption, so comparing the retail price/ml of the ink cartridges does not necessarily tell you which printer is most economical. If you anticipate switching back and forth between glossy/luster using PK ink and matte/fine art with MK ink, then the HP or Canon are more economical.
I was fortunate in being able to get excellent, comprehensive in-person demos from Bob and Jim at the ColorHQ office in sububan Chicago. They walked me through printer setup, driver/plugin settings, paper handling and loading, then we were able to view and evaluate print samples in a color-controlled environment.
The print comparisons were interesting, showing that on comparable paper surfaces the HP, Epson, and Canon were all excellent, but each had a slightly different look with different gamut and dMax characteristics. I don't know how much of the difference is due to the inks and printer characteristics and how much of it is due to the profiles and driver settings. As you would expect, the gloss/satin/luster papers had the most punch, but the high quality matte papers looked beautiful as well, with better shadow gradations than I have had on my old Epson 4000 (although some of that improvement may be due to better profiles). I normally prefer the look and feel of art/matte papers, but there was a Canon print on the Hahnemuhle Baryta paper that really stood out.
In the end I chose the Canon iPf 6100 - the June special pricing + trade-in allowance + profiles + rollpaper promo made the decision easier. I expect delivery next week, so can't yet give any feedback on delivery, setup, or real-world use.
My contacts with ColorHQ (Jim, Bob, Brian) have been excellent, I am confident that my post-sales experience will be as good.