Honestly don't know which to buy: 70-200mm 2.8/f or 6D 24-105 4/f L kit

I currently shoot on a Canon T2i (550D). My lens family consists of an 18-135mm ef-s and a 50mm 1.4/f. I tend to shoot portraiture, but I am practicing nature/landscape and would like to get into architectural and astro stuff too. I love my T2i, but I feel like I'm at a place in terms of finances and experience that I can justify some larger purchases.

I want to upgrade my camera body to something much more robust physically and in terms of features, so I have been looking into the 6D, specifically the 24-105 L kit. At the same time, I have been eyeing the 70-200mm 2.8 II for a long time. The 6D kit and the 70-200 are about the same price. I know the old adage is "date the body, marry the glass," but in this case both options end up with me having new glass to play with.

So my question to y'all is: Knowing you will eventually get both (like in the next 6 months), which would you buy first?

Afterthought: I know CP+ is next weekend, but I haven't seen any coverage on here or other nexuses of photography that I browse that indicates there will be any major announcements from Canon. The recent Pentax K-1 announcement had me drooling, but their lens lineup just didn't seem to meet my standards when I compared it to canon :(