Spiral is a Great mystery Logic anime with a Crazy plot involving the mystery of "The BLADE Children"
although some of the animes death and action scenes fairly underscore how death note works, the logic and mystery of the anime should keep you locked in atleast thats how it was for me.
heres the intro and ending videos :D though the funimation release is much better and is not clutterd but its the best i could find
[youtube]http://www.youtube.com/watch?v=bBEdWeh_bKg[/youtube]
[youtube]http://www.youtube.com/watch?v=JDiC7ap235o[/youtube]
the ending song is Frankly one of the best ending songs i believe in all of anime, sometimes i insert the dvd just to play the ending song a couple of times, its somthing i find myself relating too alot.. and the last episode gives you a complete 4 min of this song :D