Its not worth taking the restrictor out in my opinion. The top end speed is restricted to just over 100mph which is more than enough if your just learning. You will hardly notice the difference in the acceleration as the SV has a hell of a lot of grunt, even with the restrictor fitted.
The two years gives you time to become used to the power, especially if you've just come from a 125cc. I know a guy that rode a 50cc scooter for years then went for his DAS and got an unrestricted 600. He wasn't used to the power and spun the rear wheel
Plus you also get the added bonus of appreciating the extra power when the restrictor does come off
