Better Binder is my go-to--the only one I use for work and home. It offers clean design (no residue from re-labeling because you swap out labels on the inside) an array of sizes and colors and sturdiness. Excellent binder.
I use this binder to hold music charts for a music group I am in each chart is in a viable sheet so after a couple hundred charts it gets heavy. This binder is up to the task. When traveling about it gets battered around. This piece is up to the task!