I think it's a matter of opinion and how many generations of Barcelona you know...Some might say the Eto'o -Ronaldhino combination and some might say the Xavi, Iniesta, Messi combination.
I certainly think the current one has an amazing array of players and never in the history of Barcelona have 3 Fifa Ballon D'or candidates come from same team! (Xavi, Iniesta, Messi)
Their fooball is precise and beautiful. What's not to like! With all the trophies and success, they must be doing something right!