On Viewfinders

Hi All,

I have a question about a viewfinder for the DP2M.
I am used to classical rangenfinder camera's for composition. So I am looking for the best possible finder available for the dp2m. The clearer and brighter the better. If price is no object, which one would u pick? Also do u have any thoughts on the Voigtlander finders. Since the dp2m falls right in the middle of the 40 and 50mm finders, which one would u prefer to use, a 40 or a 50?

Thanks!