I am getting estimates for a sprinkler system to be installed at my residence and i have a contractor that i think i am going to go with. He handles both Rainbird and Hunter and he personally chooses the Hunter brand, but is leaving it up to me to decide. I think i have decided to go with his suggestion (because after all, he is the expert) with Hunter and he wants to install the I20's. From what i've read on here, that is a good choice i guess. Just wondering if the spray pattern is a good one. Another contractor i got an estimate from swore by the rainbirds "curtain" spray. How are the I20's compared? Is there a big difference, and will i get good coverage with the I20's? thanks for all your comments.