A few thoughts, somewhat random perhaps:

1) IMHO the 16-35/2.8II is NOT where you want to start. The 16-35/4IS is a MUCH better lens in that range, IMHO, and it's cheaper. Wait for the 16-35/2.8III if 2.8 is your mandate.
2) The 24-70/2.8II is a much wiser choice for a 5Ds IMHO than the 24-105. Much newer, far improved optics.
3) 16-35 and 24-70 is too much duplication IMHO. Either 24-70 OR 16-35 plus 70-200 (or 100-400). I've been having a lot of fun lately with 16-35 and 100-400, though that's with two bodies. See http://www.kenrockwell.com/tech/how-...an-amateur.htm
4) Consider 16-35/4IS and 85/1.2, or 100 Macro, or...