Originally Posted by Wet_Boots
Best possible head for 20 foot spacing would be the Toro 300 series stream rotor with the 02 nozzles. It's an upsell head, but not a tough upsell, based on their durability and longevity. Flow rate is a smidge under 1.5 gpm at 35 psi (1.7 gpm @ 50 psi) for a half-circle head.
And they are SO pretty to look at.