Currently in has to be Barca above Real Barca Real United Bayern Chelsea Arsenal AC Inter PSG wouldn't make a top 50.
Here we go again with the Big Club thang. Big Club is always personally subjective. Debate is useless as people will define the criteria to suit themselves. Bearsonally I feel those who feel the need to espouse their loyalty to a Big Club publicly shows up some kind of basic insecurity in their nature, a sheep like mentality, scared to be seen away from the flock. I support Chelsea whether Super Euro league or Fulham amateur Sunday league. Even if they only ever played Neasden FC just twice a year.