Based on dim and distant memory (and not spoilt at all by watching the reconstruction) I'd go for The Daleks' Masterplan. A brilliant story, and lots of death and mayhem. Of the surviving stories, it's hard to pick just one, but the Talons of Weng Chiang is hard to beat. And The Daleks.
It is a fantastic story. I am not a massive fan of the Daleks, but this story is brilliant. Shame its not whole because so many people have missed out on a great story