Rather than the 24-105, consider the new Tamron 24-70 f/2.8. And, instead of the new 70-200, think about the non-IS version.
According to reviews, the new Tamron is supereior to the old Canon, and the non-IS 70-200 is nearly the equal optically of the new IS version. With the money you save from that, you can easily get another L lens that'll give you a lot more bang for your buck.
Actually, what I'd really recommend is starting with just the two fast zooms and waiting until you run into shortcomings before you spend more money. Do you need more reach? Something wider? Something faster? Something with movements? Just those two lenses already cover almost everything photographers do, and you may well discover you don't need anything else.