Hi again,
I thought I would report in with some of my initial experience with the 7900.
Changing black inks may not take much ink (the manual says this: PK to MK 1.2 mL & MK to PK 3.4 mL ink) but i have found that it provokes a cleaning cycle which I'll bet eats up a lot more ink than that. ( I do have Autoclean Off BTW)
Quibbles aside, the printer is excellent.
I have had a chance to play with some canned 3rd party profiles which do not come close to matching the quality of the IP profiles with the 4800. (The Epson profile for the DoubleWeight Matte is excellent, but I rarely print on Epson Papers.)I am not happy to have to send off for custom profiles so I bought an i1 Pro Photo package. I'm happy to report that the initial 1600 patch profiles I have done for BC Lyve canvas or BC Optica One are easily as good as the IP profiles and much better than the Breathing Color Profiles. (I note that the IP output gives a little magenta twist to blue skies but is slightly better in the skin tones of a limited test series.)
So, at this point, I do not think I will invest further in the ImagePrint software as the value is simply not there for me. If the pricing scheme was little more liberal, (say allowing a 24 inch license to drive both 24 & smaller printers all in one license for something around ~$1000- it could be reasonable), but to have to buy two licenses just because you have a 17 inch and a 24 inch printer running is, in my opinion, quite unreasonable. Running Phatte black when I had just the one printer made good sense, but not with two printers running...
Anyways, for anyone else in this situation, I hope this might be helpful.
-evan