Just to add my experience. I Have Z 3100 and Epson 9800.
After a lot of printing and using both of printers I can say that I love and hate both of them
Now I use HP for printing on matt papers where it shines, especially black and white, which is approximatelly 70% of printing. It have the best output I ever see of any printer. HP is great printer.
Comparing prints from my HP and Canon prints (sorry I don't know exact model from which prints come but it is bought new last year and it is 44" - some customers bring prints to compare it with my prints to decide where to print for exhibition) my HP prins have much more details, some details on Canon prints do not exsist and are clearly visible on HP prints (matt papers) especially in darker part of the picture. I just adore my HP for matt printing.
Last week I printed some color prints on HP it always surprise me how it renders colors and fine details. I never ever see that on prints from other printers - again matt paper.
Why I hate it, well this is not proper word but I use phrase "love nad hate" - as I use matt paper only I need to clean MK head often, ink is bulding on it. I need to pull head out and clean it every week. I also change that head often. I have that printer for 6 years now and still have some original heads in it, MK-R head is not one of them I change it every year.
I also do not like output on gloss and satin papers - when compare it to Epson prints it always have some gloss differential, even with gloss enhancer.
Epson - I use it for PK printing only, great output, with no gloss differential or bronzing. I was not able to compare it with Canon will do some day. Not too much clogging, but every so, and always in the middle of biggest print I am printing
. A lot of waste on paper and ink comparing to HP. While HP "lay out" too much ink by dropping ink from MK head, Epson "lay out" too little ink by clogging in the middle of the print - not all the time, just some time.
Yesterday I made a bunch of test prints on new Hahnemuhle Photo Glossy on both printers. Great output from both, HP have much wider range of colour, with stronger and better reds ( I never have truoble with reds on my printer - ever with strong syntetic one ) but that translate to warmer skin tones on portraits that I actually do not like - profiles are from Hahnemuhle, did not have time to make my own. But again - even with gloss enhancer some angle of view produce gloss differential on HP prints. Epson prints are perfect. I am not sure how will they compare to Canon, but will found out one of this days by ordering same test prints fom Canon printer, which of course tell me nothing about user experince on Canon.