Thanks for the input. I'm already preparing myself mentally for having to rationalize buying the 24-70II. Just seems far and away to be better than any other options. Especially since low light capability is the biggest priority for me. Second on the priority list is convenience, and not having to switch between primes while in the middle of a shoot would be a great help.
Anyone have experience with the Tamron 24-70 with VC? I think that's my second option right now.