Used to run PR2's with my former '12 C14. Never felt the need to go to a GT. Had only use a PR3 once before I let go of my C14 (by then the PR4's were out). Point is, the most current tire isn't really necessary. Just sumptin to consider.
If you’re going to ride with a passenger then you should definitely purchase the GT tire. The Michelin PR five is a really good sticky tire that works well in the rain. I believe they work just as well as the angel Gt Tires are used just before I purchased the Michelin‘s. If you are going to have a shop put them on, I would recommend the road hazard, as they seem to be magnets for nails and screws.