My order of preference:
Benfica
Wolfsburg
PSG
Atletico
Barca
Real
Bayern
Atletico would be a painful war of attrition so I'd prefer PSG where i'd give us similar chances of beating either. Barca are the best team in the comp so i would prefer going out against them as oposed the marginally better chance of beating a slightly troubled R Madrid. I think facing Pep would be a bad idea and we would lose.
To summarise, i'd like to avoid any of the big 3, and either Benfica or Wolfsburg are preferential to PSG or Atletico.