Piston choice: hyper or forged???

Are you running a cast or forged crank? Hypers with the cast crank on a hydraulic cam mostly street motor should be fine.

Forged pistons are stronger because the aluminum is more dense and have a better grain pattern in the metal. Hypereutectics are a high-silicon alloy cast piston. This makes them stronger than an OEM type cast, but they are cast nonetheless.