Great options, by the way. I have been thinking hard about the 1921 as well as the ALS Zeitzone for a long time, and would happily own either. The only reasons that I don't are that the ratio of width to depth on the Lange makes it sit a little oddly on my wrist, and as for the 1921 I keep asking myself whether I really need another (gorgeous) three-hand dress watch given my existing selection.
I do love the Zeitzone, but then again I am (gasp) 56 years old, not 19. Lots of time for you to get into those "fussier" sorts of pieces later -- I agree with Andrew and others who are supporting the slightly edgy look of the 1921. You are young enough to carry it off (for the record, since I wear my Antiqua regularly, including for business, I think that I am still young enough as well!).
Welcome!
Best,
Gary G