Lange, Patek, Rolex, Omega no need to go into very exotic pieces just for an higher finish (and way higher price). As you already know most important is to buy what you like and stay away from the hype (anything over MSRP). I have been off the forum for a few years and I was amazed to see how your collection has evolved (remember from the Lange 1815 Honey Gold and the Omega Spectre!). A lesson can also be taken from Rolex (which is always king) closed caseback is also fine and doesn't dimish the watch.