Attached is an ABC file of 'Lord God of Abraham' from Mendelssohn's 'Elijah' which I put together a couple of years ago. Not only does the score look fine, but (with the right options) abc2midi will produce a not-too-shoddy MIDI version which you can play with a big soundfont to get very good results indeed.
Hope this inspires people to stretch their use of ABC a little.