Also does anyone have experience with the 24-105mm f4 L IS USM lens?
The 24-105mm f/4L IS is a great lens on FF. With f/4, it's really too slow for capturing movement indoors, but then for that application you often need a fast prime since f/2.8 is not very fast, either. For static subjects, the IS is great.
IQ is very good and the zoom range is excellent - it makes a great walkaround lens. There is a fair bit of barrel distortion at the wide end - pretty noticeable depending on your subject. I use DxO for post processing, and the software corrects the distortion very well (better than Canon's corrections in DPP).