Richard Mille ←
I’m well on record with how much I love Richard Mille. This is one of his most practical watches, IMHO.
It’s similar to RM010 but adds the big date, which actually changes quite a bit in the look of the movement. I love the look of the date wheel and find the big date to be one of the most useful complications. It’s much more rare than RM010, more complicated, more useful, and not a whole lot more money. Summer watches don’t get much better!