What should be completed first? Office move or Domain migration

My company is moving offices but at the same time we need to migrate our domain. We need to move to Exchange 2010, Microsoft Server 2008 and migrate our domain. I need to determine what would be the best strategy. Should I wait until after the office move to perform the Exchange, server, and domain migration? Or perform the Exchange, server, and domain migration before the office move? Any suggestion would be greatly appreciated.Thank you.