One of the classical music pieces I'm looking forward to for Easter is Mozart's Ave Verum Corpus, which we're using at Communion.  The children's choir is going to join the schola in singing this.  Plus, we may have a string quartet accompanying, or some string players with soft organ music.  I was happy to find the string quartet's parts to Ave Verum in the Choral Public Domain Library.

Not a lot of Wolfgang Amadeus Mozart's sacred music is actually appropriate for use in the Catholic Mass; even in its day the magisterium discouraged use of opera in church music.  But Ave Verum Corpus is another matter, it is definately appropriate for liturgical use, and the opportunity to use the extra instruments at Easter after the minimalist music during Lent, is something I am really looking forward too.  I know it will be uplifting for the congregation to hear the sounds of a string quartet and children's voices (with the schola singing harmonies).