Moved up to the 5D

Ok, I just upgraded from my old 30D to the 5D mkII. I did not see the worth in spending the extra $ for the mk III.

Now I need lenses for it,

I have the 50mm f/1.8

an old 35 - 105mm f/3.5 - 4.5

an old 75 - 300mm f/4 - 5.6

I shoot weddings, portraits and landscapes.

I want to get a (L) lens but don't know if I want the 70-200 f/2.8 or f/4 or the 24-70 f/2.8 or the 24-105 f/4

The BOSS (Wife) will only let me get ONE lens, and I make money on weddings and portraits.

with the money I will be able to get my next lens.

What would be my best choice be?

Thank you for reading this post. Matthew