Opinions Needed: Modular MVC

[eluser]Matalina[/eluser]
Which of CI's Modular 'extensions' would you recommend? and why?

I think I want to start using modules instead of just a co-mingling of models and controllers in the same directories for ease of maintenance. Though several models will likely spread across multiple modules. ie: I have a stores_model which access information about the stores my company has. It will be used in multiple places as different modules will need to pull store information.

Any recommendations would be greatly appreciated.