Tubbie 3's from Blowsion and the 08 SuperJet.
I don't know why these things are magic, but for me...tubbies are as essential on the 08 SuperJet as they are on the older hull designs. The new design of the hull allows the ski to corner and stay hooked up incredibly well. For racing this is amazing, but it has it's disadvantages in the surf.
Here is what I found them to do on my inital test ride.
Initially on the flat water on the way out of the harbor, the ski seemed to turn more off the front and the back end felt a little looser. I think what is going on is that larger sponson up front is allowing the ski to pivot around it to some extent. So when pushed on a tight turn, the ski gets more bite up front and this puts some leverage on the rear end. The result is a very tight, snapping turn (that the 08 lacked before) which allows the rear to predictably and easily slide out.
Once in the surf, the benefits are very clear. The ski holds a line much more predictably on the face of the wave, the added buoyancy of the nose is very confidence inspiring, and the fact the ski is much easier to predictably slide is huge.
For me, this made the ski fun to surf ride...While stock, the ski carves and turns very well...but it felt like a longboard when you tried to do to tight, aggressive snap style turns. What I mean by this is that often times the rail would just stick and I could not break out the rear end when I needed to. Now with the tubbies, it feels more like a shortboard again.