Well, after deciding between the 17-55, 24-70 and the 24-105, I have decided
to go for the 24-105 for my 20D.

I rarely take photos below 24mm on the 20D as most of my shots are people
shots. So, any objections?

BTW, will be used in combination with my 70-200 2.8IS and 50mm 1.4 prime.
An extra stop of light would be nice, but 24-70 is a bit bulky, and the
17-55 is over-priced and is restricted to the type of body used. Also, I
like in-camera cropping, so longer focal lengths can be an advantage to me.