I scrap 8 1/2 x 11 size and use regular binders with page protectors. You can get binders at office supply stores and get major deals on them at back to school time. anyway there are ones that have a clear cover on them made so a sheet of paper can be slid into the front and back cover. I decorate a sheet like it's a page and slide them in and instant cover with a protector. I have also seen 6 x 6 and 8 x 8 sizes, but they don't have the great prices at back to school time!
I also do recipe scrap books with the same idea and can decorate so easily by making what is a 'regular' size page to me.