Dumervil is obviously the bigger name and more proven, just don't think we have the cap room. I like the potential that Butler has, and if we can get good value it's certainly worth the risk, but I still would rather us find a safety in FA if possible and address the LB in the draft, just the damn uncertainty of who will be there is the problem. FWIW I was lurking on the cowboys forums, they had this thread on Butler. Take it with a grain of salt. Cliff notes: 1. pass rush specialist 2. general sentiment that he contributed positively whenever on the field 3. his talents only suited to 3-4. Also the general hate for Jerry is hilarious. Cowgirls forum thread on Butler
Side note: Did see that Rob Ryan was supposedly very high on the NT Hankins before departing, so that's something of interest for draft purposes.