MVC Models - Where To Load/Process Data?

There are 3 options where you can process data to/from model. 1) Methods can be in the actual model class. 2) Methods can be in separate class in same project (data manager classes) 3) Methods can be in a totally separate project. So what is the best option and why. I can see arguments for each option. I just want to see what others think and why. So please post which option you use and why below.

Re: MVC Models - Where To Load/Process Data?

smehaffie
3) Methods can be in a totally separate project

Testing

Code Re-use

Layer separations.