Well theres been a few....
The Bing Bang as I refer to it..... WackOff3205 vs. Magnum

Lyle vs. Missy
JT vs. Danny_G
VD vs. The Week / Newbies
Tito_BHB vs. Rick_Rack (one of the funniest also )
Steelie vs. Saddo (Naked and covered in Chocolate Syrup )
N.SideX4 vs. Any Joe C. fan
ICB vs. Memphis