I agree that the Soma Rush is a step up from a Pista in looks and performance. It also has mounts for at least one bottle cage. Frame and fork are on sale at the Soma site right now for $455.99.
Rodriguez in Seattle has some fixed gear frames with a road-ish geometry starting at $999. They will do custom geometry for $200 more, or custom paint, carbon fork, lighter tubes, anything you want - the sky (and budget) is the limit.
http://www.rodbikes.com/catalog/track/track-main.html
-Tim-