I've gotten a couple fairly nice reinfoced drops off of these, and one two handed sword that my Champion is currently using. I don't have the stats for them onhand at the moment, though.
They also drop cloaks called shadowy shrouds. They're not magical, but they are charcoal/black in color, which I thought was pretty cool. Better than spending either 6 or 30 gold on the dye for one. ;)