I've used a Big Dummy and Xtracycle. I've kicked the tires of a Yuba and a Ute.
For general purpose cargo cycling I'd buy another Big Dummy in a heartbeat. I often ride it unloaded because it's fun. I tour on it and I carry all manner of cargo on it. I'll be riding it in 10 more years.
If I was carrying very heavy loads short distances you could convince me I wanted a Yuba, but the weight and lack of Xtracycle compatibility reduce its utility to me.
If I was carrying lighter loads I'd consider a Radish as it has the Xtracycle compatibility that the Ute doesn't have.