Firstly congrats on the ac. Tough to go wrong with any Lange. my 2c: i had been waiting for lange to introduce an ac as i loved the perpetual calendar but as a man with limited resources didnt want to pay extra for that extra complication. That said, when it came out i pulled the trigger on the perpetual instead. I just preferred the aesthetics of the pc more: in particular i prefer romans (or more generally any hour indicator vs the 'sticks' in particular the double sticks at the 12). Also find the left and right subdials a bit empty. That being said, i think romans vs sticks is a purely personal call and some would argue the pc subdials are too cluttered. So in short i think purely personal preference driven.