ive done quite a bit of performance and im running a 180 degree thermostat and was wondering if a double capacity all aluminum radiator is absolutely necessary. i know that out of all the radiators out there an all aluminum radiator is going to be the strongest, perhaps longest lasting, and cool more coolant, but i can pick up a radiator that is at least as efficient as the stock unit(i now stock isnt very, but hey) and it has a life time warranty for only $350usd, as opposed to $700 something for the aluminum. what shoud i do?