i vote puller BUT, if you can have both i dont see why that wont be a better deal. then y ou will have the best of both worlds. but with a pusher, after that air get's threw it dont really have any more power to move any farther. with a puller after sucking the air threw the radiator the air still has to go past the fan thust blowing it on the motor. now it wont make that much of a difference and the air might be a bit hot by then but im sure it's something that help's. even if it is only a small fraction of a difference.