SPRINKLER TALK FORUM - You Got Questions, We've Got Answers

We're having our sprinkler expanded with new zones. One or two of them are going to be for bed areas. Most contractors are recommending using rotors or sprays in these areas, however, one wants to put in drip irrigation. They're using the type that is essentially a tube with holes every 12" - 16". No one else has suggested drip irrigation. I mentioned using a system with emitters to the company suggesting drip irrigation and they felt that it involved too much maintenance. I wanted to get some recommondations for bedding irrigation.

I may be planting some trees within the bed, but I expect to keep the trunk clear. For the most part I expect the plants to be about 3 feet tall, but I'm also considering Oleanders and Pittosporums that could be closer to 6 to 8 feet in a couple of beds
What's the tallest height of the shrubs or plants in the beds?