I don't use a RIP. Of course as long as you get an accurate profile it doesn't matter where it comes from. If you're new to both profile making and large format printing it might be easier start out with one of the Epson papers using their supplied profile. If not "dead on" it'll be pretty darn good. Get to know the printer and then print a couple of color test images. I usually prefer ones that contain a Macbeth color checker for reference (assuming you have one of these) and some skin tones in addition to other things. There are many of these on the 'Net, and good tutorials at
http://digitaldog.net/ and
http://www.northlight-images.co.uk/article_pages/test_images.html. Once you do that you can make your own profile for the same paper check it using the same test image. If it's equal to or better than the supplied profile you'll know you're on the right track and can continue on with other papers. Or, if you're going to settle on a just a few papers, say cool and warm in a gloss (or semi) and mat, you might be better off just getting profiles made. It really depends on what you want to do and the variety of papers you plan to use.
I've experimented with quite a few papers but have settled on just a few because you tend to need different matting materials with each due to the different paper colors. FWIW I've been using Ilford GFS, Epson EEF, and the Epson hot press natural and bright, and Museo Portfolio Rag. EEF had some quality issues (dark specks) that caused some sheets to be tossed, but IMO if you have an image that needs a "bright" paper it makes a print that's to die for. Yes, it has OBAs but you'll have to weigh the costs/benefits of that for yourself. I haven't used any canvas and don't intend to, so I can't be of any help there. I hope this helps, and have fun with the new printer!
