For me there are several on my mind but I think I have to say it's the Lange Timezone in platinum. There are a few (vintage pieces) I've passed on in the meantime to try to keep "powder dry" for a possible Time Zone purchase.
That said, I have a factory trip to another brand coming up and there was s a piece there that interests me quite a lot, maybe as much as the Timezone, but we'll see.
The Timezone holds particular appeal because I love travel watches/complications, and platinum pieces too, so this has been on my radar for some time. Also, I've really come to appreciate Lange and this would be my first.
What is at the top of your hit list?