I'm thinking of getting one of these, have read the reports, but would like to know if people are still happy with the lens after some time of using it. Does it stand comparison with the Leica Summicron? How does it stand normal use? Does it suck dust in, does it get sloppy? Does the paint wear off? (Is there much of a difference between the black and silver lenses?). I use mostly Leica or older Pentax lenses and I'm happy with the wear of both of these, they both seem very tough, are the Voigtländers any worse?