I've used remanufactured radiators before and never had problems with them. The gaskets and plastic parts are normally new and the core is the only part that is refurbished. I'm positive it is pressure tested to check for leaks.
If the radiator was not damaged during the install process, there must be other factors causing your system to blow up the radiator. You might want to check the radiator cap and or the thermostat for proper operation before installing the brand new radiator.