I think getting the white gold 5230 is a very solid move. I also do like this Reference and it is a great visual delight with that anthracite Guilloche.
Great photos as well!
Did you say in the text that this was your entry to World Timers? Ahem, what about your little GP ww.tc?
A side-by-side shot of those two would be fantastic!
Cheers,
CC