I need new sprinklers for the following tasks:

(1) Watering two 60'x40' TRIAGULAR lawns. Imagine a 60x40 rectangle cut
into two halves along a diagonal, that's what I have.

(2) 20'x20' rectangular gardens with plants.

Just by looking around the net, Gardena line of products has caught my
eye. They seem good looking and come with a quick-connect system.
However, I don't know precisely which models would serve my needs best
(that triangle shape is the biggest headache for me). The models a

* 3200: Small oscillator, has just range adjustment.

* 3900: Longer oscillator with range as well width adjustment.

* 350/T: Range, width, water-flow adjustment, as well as timer.

* Turbo Impulse type: Normal impulse design I think.

I guess my basic question, is what would work best for a triangle shape
lawn.