Hello and welcome.
Good proposition, spend some time studying, but not just looking at the models, look at the threads to understand what model suits you best. I advise on using Google and adding "...site:forum.replica-watch.info" to your query, you'll get dozens of threads to read and learn all possible information on the different factories and their pros/cons.
I can't speak for the daydate, but for the datejust (especially 41mm) there's some extensive and very useful threads to read. 36 mm is another story, there's information as well, but less so and in part other factories that specialize on that. That's why it's so important to study first, otherwise you may make the wrong/uninformed choice.
Good luck, enjoy hunting.