andrew_nixon said:World Cup, by some distance.
If you win a series in Australia, then you've shown you're the best out of 2 teams. If you win the World Cup, you've shown that you're the best out of almost 100 teams. It just doesn't compare.
But you only play about 7/8 to win the world cup.
If Tests had the same ammount of teams, it's not as though teams like Aus would lose to USA or PNG.
But I do agree with you, just think that if Tests were to have 100 teams, Ashes would come around about every 20 years at most.
So many players could never play Australia or for England an Ashes.
But you're right World Cup is the pinnacle of Cricket.