DxOMark published their test results for the Leica X Vario camera ($2,486.95). Here is their conclusion:
When announced, the Leica- X Vario received, perhaps unjustly, widespread criticism for the Vario Elmar’s ‘slow’ maximum aperture (f6.3) at long end. It’s of course just 1/3 stop ‘slower’ than f5.6, but it does serve as a reminder of the fastidious nature of lens selection. Despite that, the sensor in the Leica X Vario is an excellent performer, especially with regard to its high SNR. However, while the promising camera specification and the low-light performance may placate the critics in some way, at just shy of $3,000, the X Vario isn’t for everyone.