I second the printer calibration recommendation, it's very worth the paper that is used. Before doing to calibration, download the media .am1 file from the manufacturer. Use the "Edit" mode of the Canon Media Configuration Tool to see what basic paper type the manufacturer selected, and what the inkload settings are. Use those as the basis for your new custom media type that will come out of the calibration steps, and use that media type when you print the profiling patches.
To really do it right, run scuff tests on test prints with your new media type, and if necessary reduce the inkload setting if the dark ink patches smear too much after a decent drying time. There is a tendency for manufacturers to specify too-heavy inkload settings to get high d-max's on their papers, at the expense of gobbling up other not quite so dark dark tones...IMHO.