Sounds like you have Bianchi on the mind. On a mission, anything less won't satisfy the craving. I keep wanting to upgrade the bike I bought too, but everytime I ride it, I just can't come away with a miserable enough experience to justify the effort to sell it and go thru the process of getting what I think I really want. It all comes back to inexpensive, reliable, durable & decent quality with low theft appeal. What I want doesn't fit that profile, the bike I have does, a daily rider that flies under the radar.
As you are finding the Langster, if you decide to pursue the Bianchi, hope it's everything you're after, otherwise you'll be chasing a color, a component or whatever for the rest of your life ?