I'd say +1 on the converted burley for cargo use. Often, a used Burley is super cheap if the fabric is all messed up (so, no more kids). I picked up a couple here for $30-$40 (Minneapolis). For one, I used a couple of bolts to attach 1x1s across the frame, then bolted a large plastic tote to it. Now, it is my waterproof, contained, grocery getter and hauler. The second is still waiting for conversion, but I want to make it into a fairly large flat bed. I'd like it to be large enough that I could put gardening supplies, a small mower, or even a bike (even if awkwardly attached) to it. I have some spare boards and plywood, so, I'll just make a floor with it, put some hooks on the side (for bungee cords) and use it for hauling summer garden supplies and what not.

For touring, I have a Burley Nomad. It is the lightest and "nicest" of the bunch. It doesn't look homemade. However, with the fabric floor and what not...I wouldn't use it for utility hauling (it is also expensive for that purpose).