Kenny02

Hello everyone, I have a 20 x 40 in-ground pool 33,000 gallons of water. I just purchased new hayward try start 1HP pump new sand filter and new in-line chlorinator all new equipment has a 2inch opening. I'm planning on replacing the skimmer line and both return lines since they are old and one of my return line has a cracked on it. My question is should replace the pipes with 2inch PVC or should I keep it at 1 1/2 inch? Is there any benefit of using 2inch pipes? Any answer will be appreciated. Thanks in advanced!