Good fight! I slightly favour Walker, because the people who gave him the most problems at that weight were fast and stylisticaly unorthodox types such as Greb and Flowers. The Roy Jones and Joe Calzaghe of the day if you like.
Walker is a great fighter p4p. Matching him up with a man who's legacy grows by the day is difficult because we have no idea how great hopkins will be remembered. At mw tho i'm going to favour hopkins slightly.