[eluser]Devon Lambert[/eluser]
Keep doing your research,
Doctrine is heavier and full of ALOT more functionality, BUT that functionality can come at a cost if you do not know what your doing, in terms of proper SQL queries and performance.
Where as Datamapper is more light, easier to handle/control, and more importantly made specifically for CI.
The choice is yours and should be based entirely on your skill level.
One other point to consider is do you even need an ORM. I've ported an app back and forth while in development and I can honestly say that this time around the ORM is not for me.
