I unfortunately don\'t have any experience with any Voigtländer lenses, other than the 15/4.5 which is nice, but a tad soft until maybe f/8, and needs a complicated colour correction when used with an IR filter on the M8. Therefore I don\'t recommend any. There are apparently some very good ones (35/2.5?) and some less good ones (40/1.4?) but it all hinges on taste and expectation. I would say that in general for someone who likes the high-contrast Zeiss lenses, Voigtländer might not be the right brand, being on the far side of Leica for contrast, in general.
There are different approaches. I only recommend the 21/35/90 spacing because of my familiarity with Luka\'s shots. I have a similar spacing in some of my lens kits (Nikon D3, Contax 645, Hasselblad 2000FC/M, Linhof Master Technika), but have a closer spacing for my Leica kit, which admittedly is missing a super-wide at the moment: 28/2, 35/1.4A-I, 50/1.4A, 75/1.4, 90/2A (aka 90AA). I mainly have the 35 and 75 because I have the M8. Should I get an M9 or M10, I would probably have 21/28/50/90, adding the 21 Lux or 21 Elmarit ASPH to my existing lenses.
