Appropriate movies for tweeners: 11-13 year old kids

As I have mentioned in the past, I continue to struggle to solve the tension between my 11 year old son’s desire to watch all PG 13 movies that his friends get to watch and my concerns about his exposure to unhealthy material.  I have yet to find a reliable list or review source to give me a clear thumbs up or down on movies appropriate for tweeners: 11 to 13 year olds.

The best 2 resources are: plugged in and rotten tomatoes but they still are not always accurate or clear in their recommendations.

Plugged In

Rotten Tomatoes

Kids-in-mind

Anyone have a reliable list or recommendations for good tweener movies?