What I really want is a silver arowana. I love the way they swim. The jardini looks much stiffer when it moves, where the silver seems to flow. Due to space constraints, the best I can do is a tank that is 48" x 24" x 24", so if I get any arowana it would have to be a jardini. Would I be happy with it considering what i love about the silver is how it swims? What are peoples opinions who have had both on the difference in behavior?