Prime + UWA or Zoom?
I shoot FF (5D3) and recently starting carrying a Sigma 35mm 1.4 w/ the Canon 70-200mm f/4 IS. It's worked out wonderful so far and pretty much left my 24-105mm f/4 as the odd man out. It usually stays home now since I can cover just about everything I like to shoot with those two lenses.
I just got my 6D and the new Sigma 35 1.4. Together with my 70-200 4.0 IS L and my 100 2.8 IS L this will be my most used lenses.
I bought an used 28-135 lens just in case I need a multi purpose lens for events, when I do not need the highest image quality. Just for this, the 24-105 seemed to expensive to me.
so long Turner
Better a good cheese than a bad sausage.