I haven't played/DM'd all of them but I'm familiar with most of them. So far I'm most impressed with the Dungeon Adventure Path series. I'm currently DMing Shackled City for one of my groups and Age of Worms for the other. I think both are pretty sound adventures. If I had to choose between the two, I'd go with Age of Worms just because I found it easier to establish the first town (Diamond Lake), plus I think the Whispering Cairn is a great adventure.
Edit: Whispering Cairn is the first adventure in the Age of Worms Adventure Path.