Best way to keep your posters in good shape and ease of access?

[ArmyOfDarknessAW]

I have built up a small collection of posters over the years with many signed and i was wondering the best way to keep them in good shape? Right now i have them all rolled together and loosely ruberbanded with a least impotent one on the outside. however the outside one has ripped when i unroll to swap posters. I have looked for a binder of sorts, but i can't find anything like what i am envisioning. I would prefer to keep them flat which is why i thought of a binder. So how to you store your posters?

Thanks for any help!