Gator...your inbox is full!I have been on the 4 and 5 star, but not the Superspeed. The 5 stars were wonderful and have similiar performance to the Top Fuels. Having never been on the Superspeeds, I would say the decision is yours.
This past week I went out and demoed some "similiar" skis by other manufacturers. I think the biggest benefit is the XBS plate on the Nordica line. I had to keep returning to my Top Fuels to see if it was me just getting tired or if it was the ski...I hated the other skis. The XBS plate is what makes it for me. I don't think the other lines were bad by any means, I have gotten used to skiing with the XBS and it makes all the difference in the world.
Good luck with your decision, but for me...I would keep the Hot Rods!