Ihave heard tell of Sick String, the waxed variety, lasting over 30 days of intense throwing, personally, I thro chaos 122s and love them, but I do use 1 every day or so, gstring by Paul Wallace lasts longer than that from my experiance, my advice would be to try to find a string that you really like, and not worry about how long they last, as long as they play like you want (this becomes more important when you start to whip and slack). Also, in my experience, the starburst on a DM can chew through cheap polyester pretty quickly.