Personally, I found the Judgement Day match more memorable because of the return of the Undertaker, and that overshadowed the match itself, that said, I'm not a fan of Ironman matches, simply because they go on for too long and get a bit dull, whoever is involved, in fact I can't recall another 60 minute match being held again since, though for some reason I think there has been....?
Another quite underated match I thought, was X-Pac vs Chris Jericho in a steal cage, which iirc was at No Mercy? I really quite rated Sean Waltman, and although he is a bit of an idiot and a general fail, I thought he was really rather good in the ring, and always rooted for him.
On a side note, the thing I remember most about NWO 2001 was the match between Rock and Angle, when the Big Show interfered (having won the hardcore title earlier in the night), chokeslammed everyone in the ring, including the referee, for no obvious reason, and then having cleaned house just walked out, and the whole thing was never mentioned again....Another interesting part from that match was when Earl Hebner failed to count to three after the Rock rock bottomed Kurt Angle, if you look carefully (although its been semi edited out) you can see the Rock have a go at Hebner before he hits the rock bottom for the second time.