All fine choices but be careful about the 1803. It is 36mm so much smaller than all the other models you like. I have regretted purchasing watches this size as I favor 40mm and over. If you like day dates why not buy a Tudor 7020. You can get a nice one for well under $2,000, although not in gold, only steel.
Good luck with the search. The 1655 you found sounds like an interesting find, given Charlie's comments about it.
To be fortunate enough to have options and be able to purchase one or more of these beauties is a great thing in and of itself.