Secondary D300 or Fuji x100 (All depends what type of work I'm doing with them.)
I keep thinking of selling the D300 and get an Xpro1 system as a back-up but the AF is an issue with the x-pro.
Maybe they'll fix that in the replacement. Fuji makes some really cool cameras but boy do they have quirks from what I hear.
Then again, when you're the only camera maker that makes retro-style cameras, you really aren't competing with anyone.