Old Medley
I have to say, the Old Medley performance on this DVD has to be one of the greatest live performances ever. The songs were put together so well. Phil's renditions of the Peter Gabriel era songs are improvements over the originals (in my opinion at least), the instrumental section from Firth of Fifth is amazing (I happen to like Daryl Stuermer's performance of the solo better than Steve Hackett's... it just has more power). And of course, Phil's tambourine dance is great.
Of the live medleys that I've heard them do, the Old Medley is without a doubt the best one. It's a shame they're not doing it again for the Turn It On Again tour.