I used to sleep on Cowboy until I saw a fight scene Spike was in. I guess the animators modeled him after Bruce Lee. He actually using Jeet Kun Doe. The collection is phat and they just released a Movie I rented from Hollywood Video. Sick. They have a lot of background stuff like interviews with the people who do the voices. If it ain't basketball or stand up comedy, then I'm watching some anime...
I have seen to many to name this one the best ever. There are a sh*t load of good ones.
Akira
Ninja Scroll
Ghost in the Shell
Grappler Baki
My personal favorite is Neon Genesis Evangelion. Especially the bery last episode. Some of the best quality anime I've seen to date. You should check this out...
http://www.innocence-movie.jp/trailer/index.html