By the way, if you purchase the printer from different stores (say Adorama and Amazon.com) you can (legally) get a rebate on both - because (if you read the rebate form) - they are different code numbers...so technically not the same offer...so you are good to go on getting several.
The Canon Pixma Pro-100 is technically not a pro-line printer...all this means is that when the waste ink container fills, you the end user cannot replace it (or dump the ink) - the printer will need a trip to Canon. What all of us are waiting for is a chip-resetter and third party inks in cartridges for this model...and the additional grey inks have apparently improved the color gamut as well (most folks think the additional greys are for B/W only).
IMO Dye Inks are the way to go...I prefer the dye ink colors vs. pigment...and the clog factor that so many complain about just doesn't happen...yes not as long lasting as pigment ink but so long as the print outlasts me - I am good with that.