Whats the best Windows Twitter client ?

After starting to actively use Twitter I have tried few windows Twitter clients but by far the best is TweetDeck. It has the ability to group your followers which is pretty useful if you are following a considerable number of users and it also shows your Friends Facebook updates. Also it has some pretty nifty features like support for TwitPic and a whole lot more. For the full feature list check out TweetDeck windows Twitter client.