I ran my Maravia 14 X 22 Cat with 9 foot oars, and my 14X24 Cat with 9.5 foot oars. Both with a 66 inch NRS frame. I ran my 12 foot Hyside raft with a 54 inch NRS frame with 8.5 foot oars. My current Sotar 14 foot raft has the 66 inch NRS frame and I'm using the 9.5 oars. I'd go at least 9 foot. I hate short oars. I was able to angle the NRS oar towers slightly to get my oar balance perfect. No matter what I did, I could never get it right with shorter oars.
"We are all visitors to this time, this place. We are just passing through. Our purpose here is to observe, to learn, to grow, to love....and then we return home."
Australian Aboriginal Proverb