I had a 16'x24" SOTAR for 9 years that I hardly ever used. It was gorgeous and durable but didn't come close to the carrying capacity of my 14' Hyside self bailer. Small light cats are GREAT, but I just don't see the appeal of hauling gear and people in a big cat. They are so easy to overload and turn into real pigs when you do... There is no place in the bow to flop into when you've had too much to drink (and row)... Contrary to others' experience it seems, I can't fit as many fun people on a cat as a raft which is a big part of the multiday experience. I don't feel that any (negligible) gain in maneuverability over a raft is worth these trade offs.
But, if you want to haul gear in a cat, you need to think large diameter and long waterline length--that 16'x28" SOTAR sounds pretty good. Lion tubes and the old NRS Kodiak also have the proper shape. I just don't see a Jag, Leopard, or ST being the best.