Best Textbook for Q.M. Course ?



 I would like to post a question on behalf of my professor, Sergio Aragon.
 What textbook would be appropriate for a first graduate course in Valency
 and Spectroscopy? We traditionally cover basic Q.M. at the level of P.W.
 Atkins' "Molecular Quantum Mechanics".  The course is expected to
 cover
 theory, computational (ab initio and semiemprical programs including
 molecular mechanics) as well as molecular spectroscopy.  Most books
 (including Atkins) treat some of the above topics well but never ALL at
 a rigorous level.
 Thanks,
 Richard Janek
 Department of Chemistry and Biochemistry
 San Francisco State University