I have the 35 Cron Asph which I fully intended to sell when I bought the new 35 Lux, but I just have not been able to do it yet......I have no experience of the other Leica 35mm lenses so can only say that the Asph is an amazing lens but costly. I have several VC lenses which I hold in high regard, you should seriously consider the VC Nokton 35 f/1.2, faster and a lot less strain on the pocket. I know you said 35mm but the 40mm VC Nokton f/1.4 is a lens I can never quite put out of my mind.....