Epson 3880 - which version?
I have a 3880 and I got it without the RIP software. If you decide that you want to print at > than the Epson limits, folks have mentioned PrinitFab quite often. There is a home version available for about $61.00 (price in in British Pounds = 49). There is a new beta available for free until June that might be worth a try. See:
I have sent a query to them asking if they support the .icc files from the various paper manufacturers. I also use a lot of Red River paper.