have you seen either of these:

The Grim Adventures of Billy and Mandy
http://www.cartoonnetwork.com/watch/...ws/billymandy/

The Aqua Team Hunger Force
http://www.adultswim.com/shows/athf/index.html
http://www.athf.com/


I think you would enjoy them. the first is a spin off of Grim and Evil, if you have ever seen that one.