Top Law Schools

I've got a 167, probably going to graduate with a 3.1, and I'm waiting till next cycle to start applying. My question is, with these numbers, which school would give me the best chance at big law? I'm trying to stay East, and would consider a midwest school pretty much only if it could get me to chicago.

Also, I could probably improve my LSAT a bit if I prepared harder next time around, so maybe that should be a consideration.

Thanks.

with your numbers, go to a T30 and graduate near the top of your class

or

improve your LSAT, ED to a T10, and then graduate near the top of your class