It's a good one, Alex. I use it on some of my shoots, as well. I'm more inclined to use the 85L for most times, though...since I'm not really worried about 'fast as lightning' focus.
But, the 24-105L on a cropper wouldn't be bad at all. Pair that thing with a 5D like I do...and it's a magical all purpose lens, with IS! 
Good luck with your decision!




