I tend to use post bound albums when I print pages or do paper scrapping -- but I like smaller 8x8
I have gotten albums at many stores, but I was in Joanne Fabrics yesterday and all the scrap/photo albums are 40% off. They had a wide variety -- post bound and 3 rings. They also had a wide range of 4x6 albums to choose from.
I have found that if you fill the post bound too much, then there are issues and the pages snag and you cant easily turn, or add/remove pages without having lots of effort. I have bought the post extenders, and that gives some extra room. But, I found out the hard way that not all extenders fit the same albums.
I think the same thing with page protectors. There is variation across brands. I bought a ring album thinking I could put the great buy of page protectors I found, and the holes were slightly off. I then thought I could easily punch the holes and get away with it since it was just for dd to have and flip through. But that idea was a disaster. I still have the page protectors and no album to put them in. One day I will just buy some of the rings from the office supply store and make covers, but I am in no rush.