I am also using a 7900 and I haven't seen any problems with Epson's EEF profile for that printer. Black and white prints that are not toned are neutral, which is the mark of a good profile, and colors in color images are accurate. If you're talking about extremely subtle tones and nuances a custom profile might work a little better for you. Some others who have made custom profiles for this printer/paper combination seem to think that while they are slightly "different" than Epson's profile they are not necessarily "better", so don't count on any dramatic difference if you go that route. I also think the Canson IBP is a warmer paper to start with. It may be that this paper just works better with the image in question, mellowing the highlights a bit. Last but not least, the color temperature of the light in which you are viewing the print could also be the culprit. For instance, if your monitor is calibrated to a D65 white point, your print viewing light should have a color temperature of about 6500 K. Or your problem could be a combination of several of these factors. Of course all of this assumes that your monitor is accurately calibrated, you are printing through the profile in RGB color mode (Image - Mode - RGB Color in Photoshop), and you are not using Epson's ABW mode. I don't know if any of this will help, but it's all I can think of at the moment.