If the sending side can saturate your line, then you want to set a max. Some providers offer bursting where you can exceed your max for a short period of time.

If the sending side can saturate your line, then you want to set a max. Some providers offer bursting where you can exceed your max for a short period of time. You can inquire about that. I know some people drop the connection and re-initiate so they can use burst bandwidth for the entire upload.