Chris,

Even if you went with the PVC system and buried it you shouldn't need to bury it anymore than a couple of inches deep. Rain Bird is one of the major brands of the actual heads. They are the brand I have in my system and there are all different types for different spray patterns. The reason I say it doens't need to be buried deep is because you put a shrader valve on the system and come fall you just hook your compresser to the system and blow out the water.