Fuji. They are moving rapidly and the next models of their two top X-Cameras should be amazing. They are spending lots of cash on development, advertising, and lenses. The IQ from the X-Pro, X-E1, and new X100s is as good as it comes, rivaling FF in almost every aspect. Fuji has also hinted at a FF soon, and they are not like Pentax, they don't mean within 10-15 years.....maybe the end of this year.
Innovation is a "Fuji thing", and it seems to be working. Looking forward and acting fast on it are signs of a company that is thinking like a shooter, not a corporate ledger.
Regards!