Gary is correct.. this is the best forum for information about printing, but also that you'll get widely varying opinions on the brands. Personally, I use the Epson 4900 for 17" work, mostly on lustre type paper (it's set up for photo black ink) and the 9900 for up to 44" using mostly matte black ink as the default for textured matte papers and canvas. I love them both. The 4900 has caused me a few headaches, but keeps on working as does the 9900 which has been less troublesome and a pleasure to work with. As you'll read in these forums, YMMV - and that goes for any brand.
They are all good, but what I would consider is what kind of service can you get on it if you have one. In other words, if you purchase an Epson, a Canon or HP, where is the nearest service centre? Do they perform on-site service? I stand behind my Epsons, but recommended a Canon to another photographer because the service network was better where they lived. You may also want to check on availability of ink and media. I can get all my Epson ink and paper right across the street from my studio. Breathing Color canvas I have to order in, but could pick it up if need be. Check on those things before settling in on a brand.