I have a 3.4, good recs, some research exp, 730Q 590V 590PGRE 4.5W and have been contacted by 2 depts who say they are "very interested" in me, but I'm also an under represented minority. So it's def do-able. I heard from a source on the WUSTL committee that they usually don't accept people with PGRE<600 so I didn't bother applying there. Obv a shitty PGRE won't get you into the top schools, but you still have viable options.