I don't know that a real estate professional could answer that on 2 grounds. It's illegal and unethical to comment on the makeup of a neighborhood and second, what constitutes a strong black community? Strong is a subjective term. I might suggest looking in the local papers, contacting different community groups, perhaps houses of worship, town leaders etc. then you can make an informed decision. I'm not from the Pioneer Valley, but that would be a start. Fortunatly with the internet it's become alot easier to search for community groups and with blogs and other social networking groups.
Hope that is of assistance,