I have owned two 7600 and currently have a 9600. I set one of the 7600 for color printing and had Eboni inks in the other 7600. The problem I had with these printers was not using them enough. I made a habit of running a test print every two to three weeks and that did not help. I still would get a clog on one or both of them. But I also am handy and was able to clear the clogs up without issue. The prints from both of them were very nice. I got those 7600 for about $100 each so the money I spent in ink was my biggest cost.
Qimage now has a automated way to send test prints to the printers. You should look into using that.
Dwight