Given you haven't really specified what you like to shoot or the specific budget i'll take some liberties. If I was going to have two lenses to cover the wide to normal range they would be the 17mm TS-E and 24-70L ii.
A good copy of the 24-70mm ii is significantly better than the 24-105, which makes a difference because at least 60% of my photos would fall into the 24-70mm focal length range.
The TS-E offers a perspective that is rarely (Ok, basically not at all) found elsewhere. Eliminating converging verticals is important when shooting that wide. If you like architecture and industrial landscapes it is an absolute beast.
I can't really do anything other than say that the 5D2 is a great camera with crappy focus, but you have a 1D4 for that
This is simply my approach and I am sure there will be others.