Libraries or Models, favouritism?

[eluser]wiredesignz[/eluser]

A model deals strictly with data. How do I get the data, how do I store it, how do I validate that particular piece of data

Models are not strictly data, Models represent information describing something (a real world object perhaps), they can be data or otherwise, Models encapsulate the persistence layer, Yes, but they also provide business logic to describe the object they represent, and that can be anything.