Heh, the worst speakers?  Depends on the room.  Gotta say I've never heard a pair of Kefs sounds any better than awful, and I've only ever heard Linn Kans and Saras sound downright terrible, though many people assure me they sound great when done properly.  However, bearing in mind their cost, the £13k Zingalis I heard at Audio Salon a couple of weeks back would take some beating - one word: harsh!

John