Unless you are married, furniture is way overrated. You probably only need a bed, a bookcase, a table, and a chair. Anything more is counterproductive and will only distract you from keeping fish properly
I've little time now but this is just thinking way ahead, right? So now that you gave us the examples of fish that tickle your fancy, I am sure we as a community will chime in with more suggestions. The bewhiskered king Usain Bolt may or may not get dethroned... but it's an awesome catfish to start keeping catfish.