I always really liked the Brock vs "Big Evil" Undertaker Cell match during Brock's pre-UFC run, manhandling Taker on his own turf did so much to put Brock over as a fucking monster.
Hogan vs Orndorff was really great too, people were desensitized to "LOL Hogan wins because of the trainin', prayers & vitamins"; then *that* match happened
Lita vs Victoria? 1st ever Women's cage? I guess that one's significant too...