If we play a draw with Mexico, that Jap ref will cost us dearly with the silly penalty he gave to Brazil. If Croatia does advance, though, I guess the first knockout round will be the maximum for the team, not because the team is not good, but due to the attack of our potential opponents. Mandzukic might be too much for the short Chilean defenders and our midfield might be too much for the weak-ish Dutch midfield, but they won't be enough to nullify the difference between our slow defense and the power and speed Chile, and especially Holland have up front.
Saying this, Chile-Holland will be super important because the winner avoids Brazil. I share the sentiments of the majority - what a World cup!