I've been doing my own install and care for as long as I've been married. I know a lot, but not this. If your going to cover BIG lawns, which head is best, that takes the least water, and pressure to run, but cover distance? I'm on a well, and I run about 7 heads at once. The noisy ones that slap back and forth. Lol! Are gear heads better for this? I have a giant well system, and it's 5hp, and don't want it to turn on and off all the time.