I would have it pulled. We have been doing this ever since we started our business (4 yrs.) and have never got any bad comments on it. What they do is they take this machine with a big knife on it with the pipe attached to the end. Then they stick the knife with the pipe in the ground, and the machine vibrates the blade and travels forward at the same time, pulling the pipe. This hardly damages the existing lawn, while a trencher tears the grass and takes dirt out. When you pull the pipe, you do not have to replace the dirt, as it doesn't take any out. I would always go with pulling the pipe. This works the best with Poly pipe, but you can use PVC.
<img src=icon_smile.gif border=0 align=middle>