Give Marco a call at Stand Up Paddle Sports in Osborne Park. 9244 4162. He is working on some Flying Objects fins. I'm sure he will be able to suggest the best quad fin set up for your Widepoint
I borrowed a set of 4.5's out of a 8'5 pro in the rear and left the standard 4.7's in the front I liked the set up, but don't have a lot of experience. Thats what the 8'2WP runs as standard i think. See what you can borrow.
Not on a 9.5 but on a 8.10, I tried a couple of different sets and really like my FCS PC7. It makes the board a bit less stable when starting on a wave, but once you have a little bit of speed they grab and offer more grip,speed and tighter turns as the trifin set-up.