Thanks, everyone. I had that chronograph itch and it had to be scratched, so here is the obligatory wrist shot, taken this morning while I was on the train:

I just came from one of my grey dealers as I had to address an issue with a winding box; he showed me a mint PP 5059G (perpetual calendar in officer's case with retrograde function) and PP 5970G (perpetual calendar chronograph) and I've got to say that while those two were tempting, that usual little fire inside me telling me "go get it" was doused - at least for now - with my current collection and my new 116520 baby.
Then again I cannot rule out the possibility that rather stratospheric pricing kept me from opening my wallet. Both pieces were pre-owned (but incredibly lovely and mint), but the 5059G is about five times the price of a brand new 116520. The 5970 was more than eleven times the price of a brand new Daytona.............