A jardini looks better IMO but it can get nasty with other tankmates; its bad reputation is its aggression. You can see some nice jardini arowanas at Youtube. If you intend to keep other fishes with it, do some research first. A silver arowana can grow much bigger than a jardini --- are you prepared to provide space for its growth?
Perhaps you can consider something cheaper than RTG --- like banjar red arowana???
Perhaps you can consider something cheaper than RTG --- like banjar red arowana???