I've been looking for some good radiators. What do you guys think about a car's heatercore? I've got some problems procuring copper ones for cheap, does steel ones still perform better than made-for-computer radiators? These are 2x120mm fan ones. I can get the copper ones for the same price as the made-for-computer ones, but I have the impression that heatercores perform better than any radiator designed for computer use.