Where in Washington are you? If you don't want to answer, that's fine.
Western horses are in frame, but they are not really collected like your dressage horse. Watch a Reining horse move. A good Reining horse is extremely supple and collected but on a loose rein. A good reining horse moves off light cues like a Dressage horse and preforms percision movements like a dressage horse. I heard that Anky van Grunsven wants to do Reining in the 2010 olympic games.
You may like Trail too. It's not as directly related, but you definitely have to have control of all parts of your horse in a trail class.