No research is not needed even for the big name programs. While they would like you to do research cause it gives their school more prestige, the fact is that most graduates from big names are going into private practice cause the market is so lucrative. I'd concentrate on grades and esp boards. Top programs have a cut off for boards, stanford's i think was 236. Once you get into the interview, be sure to be enthusiastic have something to talk about other than anesthesia. For me that was about living overseas, photography, hiking and the outdoors in general.
good luck