Wed 31-Oct-12 01:34 AM | edited Wed 31-Oct-12 01:35 AM by LMMiller9
The short answer to your question is "Yes, they will work fine."
However, in every system there is a constraining element which is why every system can be improved. You will have about the best camera money can buy. Your biggest constraint will be your own skills. But, you may also want to upgrade your 24-120 to the newer f.4.0 version which is definitely superior and will produce superior results. Of course, there are a dozen other great lenses that you will want.
I have the 150-500 OS Sigma and the 50mm/f1.4 Sigma and they both work fine on the D800 so I am sure your 70-200HSM will also work well.
There is always something you will need to upgrade or our entire capitalist system would come crumbling down. You wouldn't want to be responsible for that, would you?