I'm still a believer of buying the best glass you can. Unless you're really blowing up images or doing a lot of PP you won't notice much difference in most general shots. Sure if you're doing it for work you would want a top of the line body, but the lens is the thing that's going to make a bigger difference.
Personally, if I was looking at spending more, I'd still settle on a 7d and buy a Canon 70-200 2.8 ii, or buy a Sigma 70-200 2.8 and a general zoom like the 24-70mm. Plus, lenses hold value much better if you do decide you want a better body down the line, so you could always sell them to put towards a new body.