DXOmark (Click here) tested the Fuji X10 sensor and here are the results: “The X10’s results are really good for its category. It achieves scores close to 1/2 stop better than the Fuji F600. Its Color depth (20.5) and dynamic range (11.3 Evs) remain in the same range as the best camera in this segment (Canon Powershot G12 or PowerShot S100).”
The price of the Fuji X100 keeps dropping. There are now small price drops every week.