what is the best radiator to buy!

[ET702]

So i found out i have at carbureted LS1 motor. it also has a cam in it, but still trying to find out what kind it is. I am interested in buying a aluminum radiator with electric fans because I live in Las Vegas and im afraid the heat may be to much. I have found some 2 tubed radiator with 1 in. tubes may be better than those with 3 or 4 rows that have smaller tubes. The truck should have about 400 to 500 horsepower by the time i get done. but i want to get the proper radiator right now. any help would do. thanks