I have just clear hose that make man sells. For pumps I have a Mag drive pump. Im about to put it in the trash though. Stupid thing doesnt want to fire when I shut off the power to it.
My return is 100% PVC. Something I might consider when I replumb it, put a ~4" peice of hose between the pump and the PVC to act as a flex pipe. Just as an exhaust on a car, I think there needs to be a little bit of flex between the piping and the pump. It gets bumped, it moves quite a bit from the pressure, I think a small peice of flex piping in there would bea good idea.