There are easy comparisons (such as comparing this watch with an iced-out Jacob & Co), and there are hard comparisons, like the one that you raised=)
These three are all very different watches with different positionings and "feelings", all of them are excellent pieces.
If I had to pick one, I probably would pick the 5712 because of the functionality and better finishing.
But then again, we Purists sometimes are animals of passion, not reason=) There are some pieces that just "SPEAK" to us like the murmuring voice in John Nash's head. And when that happens, you just have to make a decision.
After all, passion, not pure reason, is what makes us going. (Although I hope that the passion is supported by some objective measures, and some conversation with other Purists).
I myself have quite often fallen prey to strong passion, regardless of all that price-value ratio analysis...
The degrees in which other people think that we are crazy are all relative to their starting point.
After I flew back to Taipei to pick up my Survivor and then showed it to my watch buddies in NY, they shook their head and told me that I could've bought a fancy Lange or Patek in precious model, but they could understand my passion.
When I showed a "non-watch" colleague the Survivor, told him the extent that I went to get it, and then told him the price, his eyes widened immediately in disbelief, shook his head, and wanted me to take a photo of him with the watch so he could email his mother and show her "how to wear a brand new BMW on the wrist"=)
Jon