Use a 24-105 on my 60D (and also on the T2i I had earlier) Great range, at least outdoors walking. 24mm is only limiting when you get inside, especially in small rooms. But in that situation, the f4 aperture is another limit to deal with and the 17-55mm is a better choice indoors. Like I mentioned in another thread I'm contemplating moving up to FF which would turn it into a wider lens (might miss the reach of 105, although even on 1.6x it wasn't long enough for many applications)
I didn't like the variable aperture on the EF-S zooms, so I was willing to give up the wide angle which I hardly used anyway.