It seems like if you're going to go to the trouble of having a water cooled system, that putting the fan inside the case kind of defeats the purpose. You'd want either a passive radiator, or something big fan-wise, which argues for an outside the case (to go bigger/slower than 120mm) solution. Granted, I do acknowledge that cars have a similar radiator setup. But observationally, the other thing I see here is that the connections to the radiator piece appear to be all hard copper, so the motherboard/case better have a pretty exact match on alignment.