Well Don, without knowing your budget is pretty difficult but, leaving at one side the budget and the final type of cameras, I think that there is a technology really unmatched at low ISOs and that make sense having one of those...FOVEON. I think that makes much more sense the DPs than the SDs but this is already a detail to be analysed by you.
What do you think about the Foveon render?
It seems also that the new sigma lenses developed for the DPs are going to be just phenomenal based on the 30mm already launched:http://forums.dpreview.com/forums/readf ... d=41408135http://www.lensrentals.com/blog/2012/04 ... #more-6598
On the other "opposite" hand, it seems that Nikon has an edge with the new sensor of the D800E.
Although if your are speaking exclusively of Street Work...neither of the mentioned obviously...I think we should wait till May 10th...to see the "essentials" to be proposed by Leica...