Some Wonders give great bonuses, while others aren't really worth even looking at. For example, I find Stonehenge for a non-creative leader an absolute must; it's very difficult to get border expansion without monuments until you manage to get a religion, which could be a good while. Some of the Wonder bonuses almost seem like penalties - Hanging Gardens for instance more often than not sends cities into spiralling starvation because there isn't enough food support. And I don't even need to explain Cristo Redentor for spiritual leaders. So what are the best to aim for?