Unless Safin wins Madrid, Metz and Paris, then he is still likely to be number 2 barring injuries meaning he plays Nalbandian on Day 1.
Only time Russia has ever won a final when they were away, they shat themselves twice at home.
This by no means is a closed deal, i think Nalbandian will win both his matches he plays much better away in DC, less pressure. It will all come down to the doubles where I think Argentina can win. As for the other singles players, Calleri is good on fast surfaces but not as good as the 4 Russians, Acasuso has long loopy swing on both sides that is what fucks him up on fast hard court.