Alright, here's the list. I reserve the right to change or amend it after I see Hotel Rwanda & Million Dollar Baby.

1. Sideways
2. Eternal Sunshine of the Spotless Mind
3. I Heart Huckabees
4. Aviator
5. Spanglish
6. Kill Bill Vol. 2
7. The Bourne Supremacy
8. Beyond The Sea
9. The Incredibles
10. Saved!

All of these films were excellent for different reasons. Please feel free to make your own list or comment on mine in my comments.

Here are two helpful links from IMDb of Top ranked films and
Most votes. These should give you a pretty good idea of what important movies came out this year.