The Thrilla in Manilla has to be the best. ESPN done on in the 30 for 30 series called "One night in Vegas" about Tyson and 2pac.
Murder in the ring is brilliant. (or Assault in the ring) - Luis Resto/Billy Collins The HBO legendary nights are also worth a look
HBO ran a two hour long documentary on the Kiltchkos a few weeks back. I'm not sure what the title of the doc. is, but you'll enjoy it if you come across it. Was well put together.
[ame]http://www.youtube.com/watch?v=1cmPMOBkho4[/ame] [ame]http://www.youtube.com/watch?v=fGF6jB5L7ng[/ame]