Hi M8, no recommendations as I've never used or even seen a Naish SP in my neck of the woods but have a 08 Futura 111L. Repossessed it off my young fella as he has lost interest and I have only used it twice. I got myself a 7.8M 2 cam sail and a C3 42cm Venom fin to use with it for lightish winds instead of drowning on my slalom board. The two times I used it it did 31 knots on a dam and 28 in the ocean, I have no complaints with the speed for a freeride, planed early enough, turned corners well and handled the ocean chop easy.
Here's a video I've posted before of the Futura at my local beach, cheers Bob.