I say Brasil, maybe Spain. I don't think Germany or Italy will reach the semi finals. But we shall see. From a Swiss perspective it's an especially thrilling event because it's our first participation since 1994. However I think that at least a tie vs France and victories against South Korea and Togo are possible, so the eighth finals are reachable.
Group E is tougher, Italy and the Czechs are respectable opponents to the US. The US will have to win against one of these teams except if Ghana should have some surprises ready for the Europeans.