I think you need to do a little soul-searching. If the boredom will be cured 100% by the aesthetics of the tank then ok, but I would recommend evaluating exactly what you enjoy about this hobby before investing any more money. I'm being serious, I see a lot of people on here start off with a tiny tank and don't stop until they have a multi-thousand gallon plywood build with GIANT fish in it. Sometimes it's just fun until the tank is setup and boring to maintain and I see plenty of "leaving the hobby" threads where people realize they aren't enjoying the hobby unless they are buying something new and flashy, upgrading for that ONE FISH that will finally make them happy etc.. just figure out what you want out of the hobby and get that. I keep saying this but the most important factor in the longevity of the fish's setup is the owner. What do YOU want and what will you be happy with for a long time because it's a lot of work to care for these fish properly.