Spit up crazy

Help! My 4 month old baby boy is a crazy spitter! Talked with the Dr and she wasnt concerned because he is gaining weight perfectly. He is on AR formula and we even add rice cereal to it but he still is spitting up from the time he gets his bottle until the time he needs to eat again! He always smells and we go through bibs, blankets and clothes like crazy! We are currently using the Avent anti colic bottles...Anyone have any recommendations for anything that might help, even a little?