Undergraduate singers who have an interest in and experience with small-ensemble (one-per-part) work might want to consider a new MA program at the University of York (England).  Recitals are assessed for the group as a whole, and repertory ranges quite widely.  The course is run by Robert Hollingworth, who for 25 years has been the director of the award-winning English vocal group I Fagiolini. There is a special arrangement if existing groups want to register in full: an ensemble of four students that auditions and is admitted as a group only pays fees for three students—in effect, a 25% reduction.  For more information, see the website:   http://www.york.ac.uk/music/postgraduate/programmes/ma-taught/solovoiceensemblesinging/.