More high praise for the 24-70 II, with the usual caveat of price.
Question for people who've bought the 24-70 II and had/have the 24-105mm f/4L IS 'kit lens'. Did you keep the 24-105L, and if so, now that you have the 24-70/2.8 II, do you use the 24-105L any more?
I sold my 24-105 after I got the 24-70 II. I found it was a little redundant. I do miss the flexibility of the extra reach but I have the 70-200 for that anyway. I also sold my 50mm 1.4 when I got the 24-70 as I was only using it (the 50) at 2.8 or smaller anyway. Also, since then, I've found that I probably could've lived with the 24-105 and 50 instead of upgrading. I've improved my skills in PP since last year (made the jump to Lightroom) so the difference between the old setup and the new setup is even less but I like not having to switch lenses as often when I need a little more light.
The biggest difference I "feel" is in the sharpness and clarity of my pics. I have less to do in post which I'm sure adds up to a lot of time saved. Colors are better. I'm overall very happy with the new setup. To me, it was worth the difference of ~$1000 (after selling off the old lenses).