I use DAddario EXL170S. I order them from Bass Emporium, since its usually hard to find short scale strings locally:
http://www.bassemporium.com/item.php?sku=EXL170SThose do me well, since I tend to favor roundwound 100s. I also like that they don't have silks that need to be trimmed back (ala Rotosound) when used with the Gibson bridges.