Knott, I'm not the best person to comment on these, but I was looking at getting a trailer a few years ago and the best model at the time was the Bob Yak. They had one at Recycled Cycles when we were there last week.
I'm sure there are a lot of touring peeps on the board that can give you better info though.
A trailer definitely counts for retail therapy.
Living life like there's no tomorrow.
http://gorgebikefitter.com/
2007 Look Dura Ace
2010 Custom Tonic cross with discs, SRAM
2012 Moots YBB 2 x 10 Shimano XTR
2014 Soma B-Side SS