Dragonball Kai. It's a remake of DBZ. What's the difference you may ask?
1. It's projected to only be 100 episodes, which means completely cutting away 191 episodes of shitty filler.
2. They played with the imagery a bit making it suitable for widescreen and available in HD.
3. They completely re-recorded the voice acting for every episode with the original cast from DBZ.
4. You can watch the first 4 episodes subbed right here
http://www.watch-dragonball.com/cat/..._Episodes.html
New episodes every saturday.
Basically it's all things that made DBZ awesome and none of the things that made DBZ lame.