A modern aluminum radiator does not actually have to be as thick or have as many rows as the old copper brass ones did to do the job. Aluminum dissipates heat faster, Dave is right about not really being able to go too big with a radiator. But at some point you’re just throwing money at it. Serape also makes good electric fans, as do a few others. You hint have to go buy the most expensive fans just because a manufacturer has that company in their pocket.