No offense taken -- not everyone likes the look, but they work well for me. I think the 52L trekkers can be mounted as side cases too, and they are bigger than my Caribou cases. Another possibility is to take any flat-sided case you like and use a kit like this
to mount them. Just make sure that whatever the case is made of is strong enough to hold its own weight, plus the weight of its intended cargo, in a dynamic setting.