I can't believe so many people are saying Barca
Manchester united may have A LOT of plastic fans, but Barca have more and particuarly in England. The amount of people that have decided Barca are there 'second team' in the last 3-4 years is incredible. The same fans wont watch there league games on TV, but when a final comes around they are everywhere. At least Man Utd have english players and are english.
So for me, easily Man utd