I know just how pathetic it is to have to draw 
outlines with brushes - I once got all itchy. I 
used Staedler Lumicolor Permanent F. 
(Since I've become soooo picky with the quality 
of my materials (markers = Letraset TRIA) I don't 
lend them to friends at school anymore.. me's 
become SOOOOOOO inpopular!)