I impulse bought a variegated Costus off eBay (I think it's a Speciosus). It hasn't arrived yet, but I feel kind of silly because I only thought of looking up the size of the plant after buying it. Whoops!
It's a bit bigger than I expected and now I'm not sure where to put it. I've heard that Costus make good houseplants and I want to try growing it indoors, but I'm not sure what sized pot to grow it in or how much sun it needs (I don't care if it flowers or not... I mainly want the leaves).

I'm having trouble finding useful information on this species.
Anybody got any experience growing Costus in pots or indoors?
Any information would be much appreciated!