If I had $2500 I'd just go for the 24-70 II. You probably need that over the 24-105 unless you don't want to change lenses often between 24-70 and 70-200, and don't mind losing one stop of light (and more bokeh). While I love the 24-105 for a walkaround, I'm missing a lot on bokeh when I need to do a certain effect but that's just me.
My problem is what to get after my 24-105: the 24-70 II or 70-200 II.
That's why I passed on the 24-105 altogether. Picked up the 70-200 2.8II and the 16-35II, now just waiting for the 24-70II. I'd like to see a 14-24 fill in that bottom end though.
Once that happens you got the 14-200mm range covered @F2.8