I recommend either a dipole for ease of building, and the Moxon.
My experience with the Moxon is very good. I have one in the air now.
I have used PVC on several antenna builds, but in every case I had to reinforce it significantly. I abandoned its use on a horizontal moxon as it was too flimsy to hold its own weight. My best one remains the one I crafted from a $5 used walker from the local thrift store. Removing the legs of the walker with the natural corners allowed me to add tubing between the corners of the antenna for the front and back. It is lightweight, sleek, and strong.
Not wanting to be arguing the point, my experence between several 2 element yagis and the Moxon has been conclusively in favor of the Moxon. It is smaller, performs better, and seems to handle the miserable winters and windy destructive spring storms with no problems.