I definitely think it's worth it.

Harry's music is incredibly beautiful and for the most part, it stands on its own. There are certain tracks that work better in the film than on their own, like "The White Witch" and "The Stone Table", but they are few and overall, it's an absolutely fantastic score, magic.

Things to consider:

There are at least three different releases available, two official and one not so official. You have the standard Original Motion Picture Score, which at least originally came with a lenticular 3D cover insert, you have the 2 disc Special Edition Soundtrack that comes with a DVD that has a "CONCEPT ART GALLERY" that contain a couple of pieces not found elsewhere + beautiful fold out packaging and then you have the non-official "The Recording Sessions" release . The Recording Sessions CD comes with two discs containing most, but far from all of the score recorded for the film.

Here's the rundown:

Original Sountrack (Music Composed by Harry Gregson-Williams)

Content:

1. The Blitz, 1940 SCORE (2:32)
2. Evacuating London SCORE (3:38)
3. The Wardrobe SCORE (2:54)
4. Lucy Meets Mr. Tumnus SCORE (4:10)
5. A Narnia Lullaby SCORE (1:12)
6. The White Witch SCORE (5:30)
7. From Western Woods to Beaversdam SCORE (3:34)
8. Father Christmas SCORE (3:20)
9. To Aslan's Camp SCORE (3:12)
10. Knighting Peter SCORE (3:48)
11. The Stone Table SCORE (8:06)
12. The Battle SCORE (7:08)
13. Only the Beginning of the Adventure SCORE (5:48)
14. Can't Take it In PERFORMED BY IMOGEN HEAP (4:58)
15. Wunderkind PERFORMED BY ALANIS MORISSETTE (5:35)
16. Winter Light PERFORMED BY TIM FINN (4:29)
17. Where* PERFORMED BY LISBETH SCOTT (2:10)
* Bonus Track / Not Featured in Film

Special Edition Soundtrack (Music Composed by Harry Gregson-Williams)

Content:

DISC 1: Audio CD

1. THE BLITZ, 1940 SCORE (2:32)
2. EVACUATING LONDON SCORE (3:38)
3. THE WARDROBE SCORE (2:54)
4. LUCY MEETS MR. TUMNUS SCORE (4:10)
5. A NARNIA LULLABY SCORE (1:12)
6. THE WHITE WITCH SCORE (5:30)
7. FROM WESTERN WOODS TO BEAVERSDAM SCORE (3:34)
8. FATHER CHRISTMAS SCORE (3:20)
9. TO ASLAN'S CAMP SCORE (3:12)
10. KNIGHTING PETER SCORE (3:48)
11. THE STONE TABLE SCORE (8:06)
12. THE BATTLE SCORE (7:08)
13. ONLY THE BEGINNING OF THE ADVENTURE SCORE (5:48)
14. CAN'T TAKE IT IN PERFORMED BY IMOGEN HEAP (4:58)
15. WUNDERKIND PERFORMED BY ALANIS MORISSETTE (5:35)
16. WINTER LIGHT PERFORMED BY TIM FINN (4:29)
17. WHERE* PERFORMED BY LISBETH SCOTT (2:10)

DISC 2: VIDEO DVD

FILM ART GALLERY
CONCEPT ART GALLERY
BEHIND THE MAGIC OF NARNIA
FEAUTURING THE SCORE WITH
HARRY GREGSON-WILLIAMS
THEATRICAL TRAILER
MUSIC INSPIRED BY THE FILM (TRAILER)

34 PAGE COLLECTIBLE BOOKLET WITH FULL COLOUR PHOTOS AND ARTWORK CONTAINING INFORMATION ABOUT THE FILM AND LYRICS FOR ALL THE SONGS.

THE RECORDING SESSIONS 2-DISC SET, UNOFFICIAL/BOOTLEG (MUSIC COMPOSED BY HARRY GREGSON-WILLIAMS)

Content: (Tracklist below includes tracks from different sources, but most are available on the 2-Disc set I bought on eBay. Cover art of this set is different, I created the above image in Photoshop for my Ipod Touch/iTunes)

1. THE BLITZ, 1940 (2:32)
2. EVACUATING LONDON PART I (2:28)*
3. EVACUATING LONDON PART II (1:14)*
4. MRS. McREADY (0:51)
5. THE WARDROBE (3:26)*
6. LUCY MEETS MR. TUMNUS (4:25)*
7. A NARNIA LULLABY (1:20)
8. THE WHITE WITCH (4:39)
9. CONFUSED (1:11)
10. JUST YOUR IMAGINATION (1:20)
11. PETER, WAKE UP! (5:49)
12. THE ADVENTURE BEGINS (0:51)
13. THE WORLD OF NARNIA (5:49)
14. FROM WESTERN WOODS TO BEAVERSDAM PART I (2:19)*
15. BEAVER'S HOME (0:52)
16. THEY'RE AFTER US (1:10)
17. INSIDE (1:31)
18. DISCOVERED (0:53)
19. HIDE AND SEEK (2:23)
20. FATHER CHRISTMAS (3:24)
21. ACROSS THE MELTING RIVER (3:33)
22. TO ASLAN'S CAMP PART I & II (ALTERNATE I) (5:17)
23. TO ASLAN'S CAMP PART II (ALTERNATE II) (1:30)
24. KNIGHTING PETER PART I (2:04)
25. BROTHERS (1:06)
26. ASLAN AND THE WITCH (3:26)
27. THE STONE TABLE PART I (ALTERNATE) (7:25)
28. THE STONE TABLE PART II (ALTERNATE) (4:14)
29. YOU HAVE TO LEAD US (2:23)
30. THE BATTLE PART I (2:46)
31. SADLY (1:09)
32. THE BATTLE PART II (3:14)
33. PETER VS. THE WITCH (2:32)
34. THE ROYAL CORONATION (1:33)
35. ONLY THE BEGINNING OF THE ADVENTURE PART I (4:19)
36. ONLY THE BEGINNING OF THE ADVENTURE PART II (1:21)
37. CAN'T TAKE IT IN (4:58)
38. WUNDERKIND (5:35)
39. WINTER LIGHT (4:29)
40. WHERE (1:57)

The tracks on this album aren't in any kind of order at all, so I've tried to arrange them in chronological order, but there are a couple of tracks I haven't been able to figure out where to put:

38. PERPETUAL WINTER (1:16)
39. NARCISSISM (1:29)

Thank you very much for taking the time to provide so much information ! It's very much appreciated. Thanks

I found a brand new copy of the soundtrack for a dollar on rummage this summer. I really have enjoyed it especially since you can act out the movie to it ! If it is reasonably priced I would buy.

Yes, it's definitely worth it. I have the Special Edition soundtrack (the second one Griffle listed). I love the bonus features the DVD, they're fun to look back at and watch, and they offer stuff that not on the regular DVD.

As for the music itself, it's fantastic. A few notes:

-Tumnus' song, "A Narnian Lullaby' is slightly different than in the film. It's still wonderful, but I think it's shorter and there are more background instruments.
-The Battle score is edited a little bit, but that's to be expected, and it still includes all the highlighted moments from the film (the arrival of Jadis' army, the Gryffin attack, the charge, Aslan's return, the duel) on one track.
-There are four credits songs; I think only three of them are in the film. They are really great, if you're into that type of music.

I love this soundtrack. My favorites are Evacuating London, Aslan's Camp, The Battle, and Only the Beginning of the Adventure