so, i just moved my BCI into a display tank, and that means i have an empty tub. Well nothing should go to waste, right?

anyways, what do you think i should get to fill the void? I want a female suriname, but they will get too big for me to handle, and i dont want to have to give a snake away because i couldn't properly care for them! I was thinking about a corn snake, but i am not a fan of snakes without a real head (like BP and BCIs actually have heads, corns and milks are kind of lacking. lol). Then i thought about scorpians, but i would want to move them into a display eventually, and then i'll still have an empty tub.
so, any suggestions?
Thanks a ton everybody!!