Sooo, I basically only read the original post....
I have a 151 and I got into tier one, PT. Also, I'm white so no AA boost. But I also was evacuated/helped rebuild post-K NOLA. That was part, not all, of my personal statement. That said, I also have WE, which they cited in my admit letter, and my GPA was 3.6 (not stellar, but a little bit higher than 2.7). I applied early, took a shot and busted ass on all the rest of my app. And I figured if I got in nowhere, I'd just retake (had a LSAC fee waiver).
I always think about what the Dean of Admissions from UNC told me at a seminar in July last year: If it was SOLELY about the numbers, they'd stick everyone in a spreadsheet, sort high to low and take the top candidates. There'd be no reason for AdComms and no reason for PS, DS or resumes.
Give it a shot where you want to go, and if you get rejected, retake.
Please note, I am eternally optimistic, but that hasn't failed me as I ended up exactly where I wanted to be (about 9pts below the median, so there).