I'm a 3.23/173, so clearly a 173 will be more then sufficient. I would imagine a 168/9 might get you into one of the lower t14, a 170/171 in the middle-ish, a 172-174 could put you in CCN territory, and a 175+ I would think gives you a fighting chance at HYS (maybe minus Yale, since they seem to really care about GPA a lot).