Don't forget that even if the 5D3 were announced on Friday there's a fighting chance that it won't appear in the shops for months and when it does appear it's unlikely to be discounted for some time after that.
Having been a "full framer" until very recently I certainly understand the virtues in terms of IQ but having the biggest and best sensor in the world is less than half the hardware battle IMHO. If you are shooting Street in low light then maybe fast glass is even more important. And then there's the noise of a large DSLR not to mention the way such cameras are hard to miss.
I'm just a Mod here (not a reviewer or even a very good photographer) but, playing devil's advocate, have a look at the video linked to in my post here
or even the video here
. For the latter you need to click on the picture near the top of the page and wait a few seconds for the intro to finish before you get into the meat of the video.
I'm not suggesting that either camera is right (or wrong) for you but maybe the videos will help your decision along...