Just a heads up,
BBB is joke nowadays, it nothing more than a place for homeowners to complain. It's not the reputable organization it used to be.
Asking a company for references is a false sense of security, no company will ever send you a reference from a unhappy customer! They will always forward the contact info from customers who loved them!
Your best bet is find somebody who you know personally or professionally who has worked with this company in the past for a true evaluation of a company.