a few interesting points you bring:
1) 5035. It was top of my list, because of the heritage of being the first AC and and also because price wise, it is less prohibitive to buy. I was almost ready to press on the trigger, until last minute I realised I just don't love it. It is not as legible, the Roman numerals make it look a bit dated, it is smaller on the wrist, and then the romantic reason, is that it doesn't have a moon phase :P
2) 5070 vs. 5170. I have to echo your sentiment here. it looks cleaner with less clutter. plus those Breguet numerals *love*