stock sr radiator with dual 12 inchers should be good for now. its proven fmic's can cause higher temps since basically the fmic's heat exchanging process, flows hotter air to the radiator than if there was no fmic, so a more efficient radiator is preferred but if you want to wait, get e-fans with an adjustable thermostat and u should be fine i believe. the only time people over heat with fmic's is sitting in traffic for long periods of time.