Thanks Oren. Think I'm going to try that route so save a few nickels.

jp - normally I use Canson Baryta like Steven above, but for this situation I am just using binder clips and nails, and not worrying about the prints being totally flat (they won't).

Also want to eliminate glare and gloss differential from the equation so fairly certain I'm sticking with a matte rag this time. But I have seen some good looking examples of gigantic inkjet prints on some kind of vinyl that are just directly stuck to the wall.