ut4_wildwest looks nice for the small cycle. Though some invisible walls are a bit stupid. For example, you can't jump onto the horse from here because of an invisible wall.
ut4_twins_beta3 is very open and devastated and I'm afraid death would be raining just like bombardment did before the map was released.
ut_Museum looks very nice, although I don't like some of the art (seeing a girl with a monster and myself with a computer makes me think less of myself). Also, there are some missing textures.