ToDoList questions

I am really enjoying this application but I've got couple of questions:

1) Does it support large amount of data? (i.e. 50,000 tasks with text and images)

2) Is it possible to have the option to auto-save the tasks as RTF instead of HTML? This would allow me to open RTF files in numerous applications.

3) Can new tasks go directly to rich text format in the editor by default?

I would like to use this application for both ToDos and storing large amounts of information (text and images) with the ability to quickly search for keywords. If ToDoList is not meant for that, I am open to suggestions of other similar apps.