You brought out a number of details I hadn't observed, such as the angle of the 5 and 7 hour markers, and is very informative. I fully agree with your view on the case and lugs, which are beautiful.
I also love the guilloche on the 5930 much more than on the 5230.
I liked the 5930 as soon as I saw it, and still do after trying it on. However I have a couple of issues with it.
Firstly I think it is too thick. After wearing both the 5230 and 5930 I find the 5230 better proportioned.
Secondly the chrono register is too short at 30 mins. I think 60 minutes would have been a better compromise between legibility and functionality.
Overall though I think it is a wonderful watch and the above issues would not prevent me purchasing one.