That's a pretty bold statement there considering the new Canon 1D-x is supposed to be the most well performing DSLR ever made in low light conditions going up to ISO 52,000 on a full frame sensor hahaha. Of course that goes without saying that a 5D II will out perform a D70 in low light etc., it's obviously an extreme example but you get what I mean. You made a very large generalization there, and it's not relevant at all. Also I think it's the other way around for glass prices too. I just looked on B&H quickly and the 24-70 2.8 is $500 cheaper from Canon but didn't care to put in more research than that.
All in all they both make incredible camera equipment and you can go either way as long as you're not getting into super telephoto or anything (which I highly doubt from the OP) because Canon has a much better range of lenses up there. It's all preference, hold them in your hands and go with ergonomics is what I would say.
my two cents.