Have you considered the 15-85? I know it is slower but you will get wider and longer shots from it. If I had stayed on crop (had they released the 7D2 when they released the 5D3...), I would have got the 15-85.
Same for me - if I'd stay on crop, the lighter and newer 15-85 would be the lens for me - larger zoom range, great iq, excellent value. Look at your shots and determine if you really need constant f2.8 with the thin dof (you've got the 50/1.4 after all), a wider angle accepts lower shutter speeds.
Btw, I know it's an unusual advice in a high budget enthusiast forum apart from the general "just get the most expensive" no matter what :->