1. Number 23 (AWESOME!!!)
2. Golden Compass
3. Ratatouille
(Very distant) 4. Resident Evil Extinction

As for the worst it's GOT to be Saw IV!!

Actually, I thought the Departed was significantly better than Infernal Affairs (I saw Infernal Affairs before Departed existed). The love story in IA was... bizarre, to say the least. Felt completely artificial and unnecessary. Also very sudden. The whole movie ended rather akwardly. 

The alterations made to that love story were dramatic and entirely succesful, in my opinion. 

V for Vendetta was good too
Ratatouille also

worst movie of 2007 :

300 + Transformers

Transformers
Live Free or Die Hard

still haven't seen sweeney todd and probably won't but I hope it's good.

I felt the opposite. It felt forced to me that they made the love interest the same for both moles in the departed. I also preferred the acting of the moles in IA to Leo and Matt. That said I like Alec Baldwins character but felt mark Wahlberg was bit much. However since you have seen both films you have to agree that the most powerful scenes were ripped from the asian film like the "lawyer" scene, The theater Scene, The roof top scene, The discovery scene, The elevator scene. The only part it kind of seperates is the begining, The hollywoodized ending and switching Thais and drugs to Chinese and microchips( Departed also intergrates some of IA 2 and 3). As I said the main thing for me is that Scorsese did not acknowledge the previous film.

The Bourne Ultimatum

Its rare that sequels are equal or superior to the originals but this is one film series that has managed to maintain its tone, mood, style and setting whilst moving to story in a forward direction.

Spider-man 3 failed miserably and I never believed Saw IV would come close

300

saw iv!!

one of the best ever!! (and discusting~)

The only movie I really liked that has an IMDB date of 2007 was "Shoot 'Em Up".

That being said, 2007 was a crappy year for movies. I thought "The Bourne Ultimatum" was the most boring film of the trilogy.