Read reviews for the SC9.7 Quad Fin by Blair SUP as submitted by your fellow paddlers. All of the reviews are created and written by paddlers like you, so be sure to submit your own review and be part of the community!
For riding waves I haven't found anything close. It can make very sharp radius turns and come around with ease off the white-water. It even works well on coastal cruises, but it's not a racer it's a surfer!
I use it almost daily for surfing and getting to remote surf spots.