<p>All three are absolutely excellent (and I really do mean that). Attending either of these universities would look good to graduate schools. In terms of ranking, all three schools are ranked between 10 and 20 (inclusive). Duke is ranked the highest out of the three but the number of places separating the highest and lowest ranked of these schools is only 7 and that is not a significant difference. So in terms of overall school, all three are great.</p>
<p>Now, for the specifics. All three are known to have great bio programs. Wash U. and Emory are extremely pre-med oriented with a significant percentage of the undergrad population following a premed track. Specifically for biomedical engineering, Duke is one of the best in the nation so if you specifically looking into that, then Duke would be the best option. For bio, however, I would say that all three are great and differences in ranking would not be too significant.</p>