How does the iPF6100 compare to the HP Z3100 and Epson 7880?
Problems with iPF6100: Covered in the Known Problems section of the Wiki. Problems with HP Z3100: Weak reds, especially on matte papers. Pizza wheels/roller marks on gloss papers experienced by some (update 12/8/07: hardware fix will be made available free by HP per this LL thread). Ink overspray with heavy/continuous use. Firmware/drivers not mature yet, although Firmware version 6 released end of October, 2007. See also the HP Z3100 Wiki to help with your purchase decision. Problems with Epson 7880: Substantial ink wasted in swapping photo black and matte black. Unknown at this time whether it will be less than the 90 ml needed for swap on Epson 7800. Significant potential for clogging, especially if not used regularly (based on Epson 7800 experience), with subsequent waste of ink and time.