LSAT and GPA matter the most, in that order. Based on your past success with grades and standardized testing, you're pretty much where you want to be. That being said, if you can go from 95% to about 97% you'll really increase your odds of the top schools dramatically.
Great GPA from a good school will trump good GPA from a great school, for admissions. The better UG reputation may help you land internships and jobs if the UG has a really strong alumni network, and a good history of sending people to law school. I.E., if you can get into an Ivy, then go for it. But, if you're picking between USC and UCLA, no one really cares.