Hawk brake pads - worth it?

Rotors are stock replacement, 11" x .81". Perhaps caliper vs. caliper you don't save a ton but everything else that surrounds the brakes is larger too. Those integral rotors are super heavy, larger ball joints, UCAs etc. It all adds up. What problems do aluminum calipers cause?

Do you mean BBP brakes? Back in the day Corvettes had K-H or similar made of aluminum and had serious corrosion issues and stuck pistons. Are you using aftermarket hubs? Ball joints and UCA are the same as what you have? All I'm trying to say is, maybe OEM is not as heavy as you think.