Ahh I misread your post , I thought you had a M6 , not a leicaflex SLR . If you have about 2000 euros there is an option for you still

You can get a leica R8 or R9 and pick up the DMR ( Digital-Modul R) thats a digital back that attaches to the SLR and makes it into a Leica Digital , they are quite rare however , but apparently phenomenal in their build quality.
Re: my shot, I have to confess, the DOF is all the gear, the interesting colours are down to 2 things, the sushi restarant has a lot of coloured lights, and I used Alienskins Exposure plugin for lightroom to emulate Velvia 50
