I'm thinking about the EF 24-70mm f/2.8 L II USM but it seems to overlap the 24-105 as far as focal length goes but it does have a wider aperture. I usually switch between the 24-105 f/4 and the EF-S 17-55 f/2.8. I was looking at testing a 1.4 to see how it performs in low light though.

On my 7D the 35mm is basically a 50mm and the 50 1.2 is 80. I wonder if the 50 would be best if I wanted to use 1.4 as it has extra reach?