I use Hollywood Poster Frames and have not had any issues with fading. They are excellent frames and endorse them whole heartedly. That said, I have had a one sheet in a Michaels art store frame (not uv proof plexi) and have not noticed any fading or sun bleaching. I think a good rule is just try not to place the poster where it will be in direct sunlight for hours on end. I believe Harry uses a film on his windows which is brilliant IMO. Anyhow, I like your collection Chop and see we have similar tastes.
Yup. UV Plexi from HPF to filter out sunlight and room lights + UV film on the windows to further protect posters, woodwork, furniture fabric, etc... I think the film for all my windows only cost $100 or so, but it was a pain in the ass to install. Still, it is great for piece of mind.
The only thing left to do is make sure you keep heat down by making sure the posters stay out of direct sunlight. I still have one or two posters that get hit directly by sun rays, but that is usually only in winter (when the sun is low) and only for a short time during the day. So far no problems... fingers crossed.