Most good ITX cases are expensive and the Prodigy is one of the few that is cheap AND can support a 240mm radiator. A Cooler Master N200 also seems like a bargain as a temp case and as a future low/mid-end build for anything universal.
I'd go with the N200.
Its a good bit cheaper and it supports mATX which will increase your potential resell market.
It also happens to be about 2" narrower and 1" shorter than the Prodigy thought it is about 3.25" longer.