I disagree. Unfortunately the "my friend got in with X gpa and Y LSAT" doesn't work for me; anecdotal evidence lalala.
Most indexes are weighted toward LSAT Scoring in the top 50% of the LSAT is neccessary for the top100; on the side note scoring on the top 50% of GPAs (for you're school if you come from a truly huge school like UT-Austin) is not neccessary at all.
I'll use myself as an example but not proof. I have 2.95/164 numbers. LSAT top 9% GPA botton 76% (for UT-Austin). Granted I'm not going to rock the top 14 but it would be possible for me to break T1 if I was willing to live in the midwest or some other non-Texas zone.
If you changed my numbers around to be the inverse situation I would have very little chance except the very bottom of T4-- as I like to call T5.
All things being equal I think scoring a little higher on the LSAT is both more important and more likely for a junior/senior in college.
Check out the schools in Arkansas. TONS more affordable and really more respected at least in the area. Coastal seems shady since its for profit and SO fast with their accepts. Although in the SanFran area I've heard some relatively positive things about GG (considering that it isn't a T1 or anything). On the other hand you could probably get into either U. of Ark and the out-of-state tuition is what? 10k. Cost of living isn't much either