Champions League Winners- Barcelona, Spanish Team
Uefa Cup Winners- Sevilla, Spanish Team.
Most successful club in Europe- Real Madrid, Spanish Team.
Even the best players play in the Spanish League. Since 2001, all the winners of the FIFA World Player of the Year award, have been ones playing in Spain.
Just have a look since 2000:
Uefa Champions League
2000,2002- Real Madrid
2006 - Barcelona
Spanish teams have dominated Europe, and that is the direct indication of the strength of the domestic league.
Calling the Serie-A better than anything is simply stupid.
The Premiership is good, but doesnt have the flair and excitement that the La Liga offers.