I agree with Simpleman, Riken is a very underrated and good company. I had one for ten years and beat the crap out of it. Never needed a patch. I also had an Avon for a number of years with a DRE fishing setup. It was also a great boat.
I now have a Sotar cat, which is more suited to flyfishing. I am very impressed with Sotar's material, it is light, strong, and slick as snot for going over shallow stuff.
Bottom line; if you want a boat you will pass on to your kids, get a top of the line hypalon boat [Avon, Hyside] or maybe Sotar's urethane [Time will tell how long it lasts]. If you want a boat that will start to break down in ten years, go with the cheap PVC brands. Like most things; you get what you pay for.
Thinking back, I think the only advantage to the raft is if you want to run a paddlecraft and take a bunch of people, or you want to take younger kids down the river. Since I never run a paddleboat, and now that my kids are older, I would not go back to a raft. The cat is more nimble in hard whitewater, better in shallow draft situations [If not overloaded], and a much better fishing platform. Having kayaked the last 20y, I can say the cats perform much more like a kayak, compared to a raft, which rows more like a log.