For both renovation and new construction, I think to prefer CPVC. It's cheaper in labor, cheaper in material, and isn't a theft risk. (In fact, when there is Copper piping in a house I will sometimes go in and spray paint it white to look like CPVC)

On the other hand, the salty dogs in the business will say that CPVC maybe won't last like Copper. The commie-pinko greenie weenies (No offense to any here, just playin') say that copper has natural anti-microbal properties and is healthier than CPVC, which might impart toxins into your drinking water.