Several months back I discovered Firefly... better late than never. Ranks right up there with Battlestar Galactica and Star Trek NG. Very interesting mix of old western culture in which the wealthy planets of the "Alliance" enjoy the best technology while the poor settlers of the outer planets scrape by living in conditions we can expect in a post-peak oil earth. The effects are excellent and very well balanced with an emphasis on the story and character relationships.
More info via the Firefly Wiki.