just received my financial aid package from cornell and was really surprised i didn't even qualify for need based grants (my parents combined income is ~75k/yr) after being accepted april 30th

I have 20k in undergraduate loans
biglaw
no strong preference for north or south, though i feel that with 250k++ debt i'd be safer in NYC
nashville is way more my scene than ithaca, but law school is only 3 years long and i dont want this to weigh in on my decision
im also waitlisted at columbia, chicago, nyu, northwestern. it'd be sweet to get into any of these, but i only have til the 14th to put a deposit down on cornell.
sorry for the double post, but i wanted to add the financial aid info and a poll. Anybody have any experience negotiating cornell for $$? I've read most of the cornell vs ??/vanderbilt vs ?? posts on the board and the general consensus seems to be that you had better graduate top 1/3rd of your class at vandy or 2/3rd at cornell. is the extra security worth ~80k in debt?