Bowdoin is a great college,and would be a great choice. All three would. I just thought I would clarify something from the last post. Amherst actually was the first college in America to have a neuroscience major, and it is a particular area of program strength there. This article ranks it as the best undergrad neuroscience program in the nation.
http://study.com/articles/Best_Neuroscience_Undergraduate_Programs_List_of_Top_Schools.html
I also have no reason to think that Bowdoin has more research opportunities than Amherst (or that it has less). Both have plenty, more than you will ever need.
Both of them are great choices, and there are plenty of reasons to choose one over another. Just not that one.