I'd like to recommend the Landmark Herodotus and the Landmark Thucydides texts. Both contain helpful annotations and maps and would make wonderful additions to the Noet library.
http://www.amazon.com/The-Landmark-Herodotus-Histories/dp/1400031141
http://www.amazon.com/The-Landmark-Thucydides-Comprehensive-Peloponnesian/dp/0684827905/
