Alphaman - let me know if you think the 19mm distorts too much for your taste. I am thinking of returning mine.
That's interesting. I don't really find the distortion of the 19mm to be an issue. It only needs a slight correction in raw. I'd imagine the only way to get a similar lens with less distortion would be to use a symmetrical M wide angle, but then you're left with all kinds of issues at the edges.