Leica V-lux 4 or D-lux 6
I moved from the Panasonic LX-3 to the D-lux 6 and I am glad I did. Although the LX has served me well, the D-lux is so much better in zoom speed, video mode, noise, operating speed, better screen etc. I shoot in RAW only and this gives me perfect control over noise reduction, sharpness and white balance.
Now the Vlux is a nice camera and perhaps more versatile, but it is definitely more noisy (although correctable) and the lens is less sharp. I had a Vlux, but the difference with my Canon40D was too mutch. De D-lux does a better job.
But then it all depends on your needs.