We looked at a Travis before buying the Clark. In fact, a guy down the road sold his and went to a JM hopper shortly after we bought our Clark.  One thing that is a plus or minus depending on your view point is the Travis doesn't have a cross auger.  The down side is they have to be that much taller so it can gravity feed from the boxes.  The Clark is a lower and (at least to me appears) more stable because the boxes are inline and lower, but has a poly cross auger to go from the boxes to the fill auger.