The island of Barbados was a thriving center for the Caribbean slave trade, and a common destination for slaves on the other side of the Middle Passage. From there, slaves were sold in all directions, to the spice islands, Cuba, Haiti, the United States (or the 13 colonies depending on the time frame) and also in large numbers to the north coast of South America and Brazil (though many slave voyages went directly to Brazil, the destination for a staggering 3 million slaves total).
I would think the history of Barbados, or an analysis of the slave trade as it existed there would be a great topic. Wouldn't mind reading that research paper when you are done. :-)
You might also consider an in depth study of the writings of Olaudah Equiano, one of the few slaves to write eyewitness accounts of the Middle Passage, and who also arrived in Barbados to be sold.