abe
303
I faced a similar dilemma!
However, I was trying to chose between WG Zeitwerk and Langematik perpetual; surprisingly I ended up getting a Platin Dato up and down which was spur of a moment decision ( take it or leave it kind of a thing). In the end, I couldn't be happier with my acquisition and the watch, even on my small wrist sits very well (see my crude iPhone pic a couple of posts earlier).
I am very intrigued by Zeitwerk and would like to acquire it hopefully sometime in future, if possible. Like yourself, date function is very important to me and I am glad this opportunity presented itself for me to acquire the iconic Dato

)
I personally find the new Dato up / down to be a more balanced watch both from a dial perspective and case dimensions, as compared to the original version; this is obviously just my subjective opinion and experience, after having owned the previous version in Rose, which I sold a while ago to fund a different piece!
Please refer to couple of earlier posts by myself, which also includes valuable input from other Lange aficionados.
Best of luck with your decision.